Exhibit 2(a)

                              AMENDED AND RESTATED
                          PLAN AND AGREEMENT OF MERGER

            THIS  AMENDED  AND  RESTATED  PLAN AND  AGREEMENT  OF  MERGER  (this
"Agreement") is entered into as of the 17th day of March 2004, by and among U.S.
Home & Garden Inc., a Delaware corporation ("USHG"), Ionatron Acquisition Corp.,
a Delaware corporation which is a wholly owned Subsidiary of USHG ("Merger Sub")
(USHG and Merger Sub collectively, the "USHG Parties"), Robert Kassel ("Kassel")
(for the purposes of Sections 5.9, 6.2(d),  6.2(j) and 9.4 and 10.10 only), Fred
Heiden (for the purposes of Section 9.4 only),  and  Ionatron,  Inc., a Delaware
corporation  ("Ionatron"),  and Robert  Howard,  Stephen W.  McCahon,  Thomas C.
Dearmin  and  Joseph  C.  Hayden  (collectively  the  "Ionatron  Stockholders").
Capitalized  terms not defined in this Agreement  have the meanings  ascribed to
them in Annex 1 hereto.

                                    RECITALS

            WHEREAS,  the Board of  Directors  of each of USHG,  Merger  Sub and
Ionatron has  determined  that it is in the best  interests of their  respective
stockholders  for USHG to  acquire  Ionatron  upon the terms and  subject to the
conditions set forth herein; and

            WHEREAS,  the USHG  Parties and Ionatron are desirous of effecting a
merger, all upon the terms and conditions set forth herein.

            NOW, THEREFORE, the USHG Parties, Kassel, Ionatron, and the Ionatron
Stockholders,   intending   to  be  legally   bound,   for  good  and   valuable
consideration,  the receipt and  sufficiency  of which are hereby  acknowledged,
hereby represent, warrant, covenant, and agree as follows:

                                    SECTION 1
                                   THE MERGER

      1.1   Merger.  Subject  to the terms  and  conditions  of this  Agreement,
Merger Sub shall be merged with and into Ionatron in a  transaction  intended to
qualify as a tax-free  reorganization  pursuant  to  Sections  368(a)(1)(A)  and
(a)(2)(E) of the Code.

                                    SECTION 2
                                 TERMS OF MERGER

      2.1   Terms of Merger;  Effective Time. The terms of merger (the "Merger")
are as follows:

            (a)   Merger  Sub  shall  be  merged  with  and  into   Ionatron  in
accordance with the statutory provisions of the Delaware General Corporation Law
("DGCL").

            (b)   Ionatron shall be the surviving  corporation  (the  "Surviving
Corporation"),   and  the  corporate  identity,  existence,   purposes,  powers,
franchises,  rights,  and immunities of Ionatron  shall continue  unaffected and
unimpaired by the Merger. The corporate identity,  existence,  purposes, powers,
franchises,  rights,  and  immunities  of Merger  Sub  shall be merged  into the
Surviving  Corporation,  and the  Surviving  Corporation  shall be fully  vested
therewith.

            (c)   Immediately after the Closing, the Merger shall be effected by
filing with the Secretary of State of Delaware the Certificate of Merger annexed
hereto  as  Exhibit  A (the  "Certificate  of  Merger").  The time at which  the
Certificate  of Merger is filed with the Secretary of State of Delaware shall be
the "Effective  Time" of the Merger.  USHG shall cause the Certificate of Merger
to be so filed and recorded within one (1) business day after the Closing Date.

            (d)   Except  insofar as  specifically  otherwise  provided  by law,
Merger Sub shall cease to exist at the  Effective  Time,  whereupon the separate
existence of Ionatron and Merger Sub shall become a single corporation.

            (e)   The Certificate of Incorporation and By-laws of Ionatron shall
be the certificate of incorporation and by-laws of the Surviving Corporation.

            (f)   At the  Effective  Time,  without  any  action  by the  holder
thereof,  all of the issued and outstanding shares of Ionatron Common Stock, par
value $0.01 per share par value (collectively, "Ionatron Common Stock") shall be
deemed cancelled and converted into the right to receive shares of common stock,
par value $0.001 per share, of USHG (the "USHG Common  Stock").  The USHG Common
Stock issuable to the Ionatron  Stockholders  shall be deliverable in the manner
set forth on Schedule  2.1(f) or as otherwise  agreed by the parties.  Except as
otherwise  provided herein,  the aggregate number of shares of USHG Common Stock
issued to the Ionatron Stockholders pursuant to this Section 2.1(f) shall equal,
as of the Closing Date,  sixty-five  percent (65%) of the USHG Common Stock on a
fully diluted basis (the "Merger Consideration").

            (g)   Fractional shares of USHG Common Stock shall not be issued and
each holder of Ionatron  Common Stock who would otherwise be entitled to receive
any such fractional shares shall forfeit the right thereto.

            (h)   At the Effective Time, USHG shall direct its transfer agent to
issue  certificates  evidencing  such  number  of shares  of USHG  Common  Stock
issuable to holders of Ionatron  Common Stock in the Merger  pursuant to Section
2.1(f).

            (i)   If any  certificate  representing  Ionatron Common Stock shall
have been lost,  stolen or  destroyed,  upon the making of an  affidavit of that
fact by the person  claiming such  certificate  to be lost,  stolen or destroyed
and,  if  required  by USHG,  the  posting  by such  person  of a bond,  in such
reasonable amount as USHG may direct, as indemnity against any claim that may be
made  against it with respect to such  certificate,  USHG will issue in exchange
for such lost, stolen or destroyed  certificate the Merger Consideration and any
dividends  or other  distributions  to which the holders  thereof  are  entitled
pursuant to this Agreement.

      2.2   Closing.   The  closing   (the   "Closing")   of  the   transactions
contemplated  by this Agreement shall take place at 10:00 a.m. EST on the second
business day  following  the  satisfaction  or waiver of all  conditions  to the
obligations of the parties hereto to consummate the transactions contemplated by
this  Agreement  (the  "Closing  Date"),  at the offices of Blank Rome LLP,  The
Chrysler  Building,  405  Lexington  Avenue,  New York,  New York 10174,  unless
another time, date or place is agreed to in writing by the parties hereto.

                                        2


                                    SECTION 3
                   REPRESENTATIONS AND WARRANTIES OF IONATRON
                          AND THE IONATRON STOCKHOLDERS

      Ionatron and the Ionatron Stockholders, jointly and severally, except
where otherwise provided, represent and warrant to the USHG Parties as of the
date hereof and as of the Closing Date (except for representations and
warranties that speak as of a specific date or time, in which case, such
representations and warranties shall be true and complete as of such date or
time) as follows:

      3.1   Organization of Ionatron.  Ionatron is a corporation duly organized,
validly existing,  and in good standing under the laws of the State of Delaware.
Ionatron has the  requisite  corporate  power and authority to own,  lease,  and
operate its  properties,  to carry on its business where such properties are now
owned,  leased,  or operated  and such  business is now  conducted.  Ionatron is
qualified to do business as a foreign  corporation in the jurisdictions in which
the failure to so qualify would have a Material Adverse Effect.  Ionatron is not
a  participant  in any joint venture or  partnership  with any other Person with
respect to any part of its operation of its business.

      3.2   Capitalization; Ownership of Common Stock.

            (a)   The  authorized  capital  stock of Ionatron  consists of 3,000
shares of common  stock,  par value $0.01 per share,  of which 1,600  shares are
issued and  outstanding.  All of the issued and  outstanding  shares of Ionatron
Common Stock and their  ownership  are as described on Schedule  3.2. All of the
outstanding  shares of Ionatron Common Stock have been duly authorized,  validly
issued  and are  fully  paid and  nonassessable  and are held of  record  by the
Ionatron  Stockholders as set forth Schedule 3.2 hereto. There are (a) no shares
of Ionatron  Common Stock held in treasury;  (b) except as set forth on Schedule
3.2,  no other  issued or  outstanding  equity  securities  of Ionatron or other
securities  of  Ionatron  convertible  or  exchangeable  at any time into equity
securities  of  Ionatron;  and (c) no  outstanding  stock  appreciation  rights,
phantom stock rights,  profit participation rights, or other similar rights with
respect to any capital  stock of Ionatron.  Except as set forth on Schedule 3.2,
Ionatron is not subject to any  commitment or obligation  that would require the
issuance or sale of  additional  shares of capital stock of Ionatron at any time
under options, subscriptions,  warrants, rights, or other obligations.  Ionatron
does  not  have  any  Subsidiaries  and  does  not  own  any  interests  in  any
corporation,  association,  partnership,  joint venture,  trust, estate, limited
liability  company,  limited  liability  partnership,  organization or any other
entity.

            (b)   Each Ionatron  Stockholder  represents as to himself only that
he has good and marketable title to all of the issued and outstanding  shares of
Ionatron Common Stock issued to such Ionatron Stockholder, free and clear of any
and all liens, adverse claims, security interests,  pledges, mortgages,  charges
and  encumbrances of any nature  whatsoever  ("Liens"),


                                       3


and on the Closing Date will own all of his  respective  Ionatron  Common Stock,
free and clear of any and all Liens,  including,  but not limited to, any claims
by any present or former stockholders of Ionatron.

      3.3   Authorization,  Validity and Effect of Agreements.  Ionatron has the
requisite  corporate  power and authority to execute and deliver this  Agreement
and all  agreements  and documents  contemplated  hereby.  The  consummation  by
Ionatron of the transactions contemplated hereby has been duly authorized by all
requisite corporate action,  including approval by the Ionatron  Stockholders as
required to consummate the Merger.  Each Ionatron  Stockholder  represents as to
himself only that he is an individual having all necessary  capacity,  power and
authority to execute and deliver this Agreement and such other  agreements to be
executed and delivered by him pursuant hereto and to consummate the transactions
contemplated hereby and thereby. This Agreement constitutes,  and all agreements
and documents  contemplated  hereby (when executed and duly  delivered  pursuant
hereto) will constitute,  the valid and legally binding obligations of Ionatron,
and each Ionatron Stockholder represents as to himself only, him, enforceable in
accordance  with  their  respective  terms,  subject to  applicable  bankruptcy,
insolvency,  moratorium or other similar laws relating to creditors'  rights and
general principles of equity.

      3.4   Books and Records.  Except as set forth on Schedule  3.4, the minute
books, stock record books, and other records of Ionatron, all of which have been
made available to USHG, are complete and correct in all material  respects.  The
minute book of Ionatron  contains  accurate and complete records in all material
respects  of  all  meetings  held  of,  and  corporate   action  taken  by,  the
stockholders,  the Board of Directors,  and committees of the Board of Directors
of Ionatron,  and no meeting of any such  stockholders,  Board of Directors,  or
committee  has been held for which  minutes  have not been  prepared and are not
contained in such minute books.  At the Closing,  all of those books and records
shall be in the possession of Ionatron.

      3.5   Absence of Conflicting Agreements. As to Ionatron, the execution and
delivery of this Agreement and the consummation of the transactions contemplated
by this Agreement  (with or without the giving of notice,  the lapse of time, or
both):  (a) does not require the consent of any third party or novation from any
Government  Authority (as hereinafter  defined);  (b) will not conflict with any
provision of the Certificate of Incorporation,  By-Laws, or other organizational
documents of Ionatron;  (c) will not  conflict  with,  result in a breach of, or
constitute a default under, any applicable Order, Legal  Requirement,  or ruling
of any court or  Governmental  Body to which  Ionatron is subject;  (d) will not
conflict with,  constitute  grounds for  termination  of, result in a breach of,
constitute a default  under,  or  accelerate or permit the  acceleration  of any
performance  required by the terms of, any agreement,  instrument,  license,  or
permit to which  Ionatron  or any  Ionatron  Stockholder  is a party or by which
Ionatron  or its assets are bound;  and (e) will not create any Lien upon any of
the assets of  Ionatron  or any of the  Ionatron  Common  Stock.  Except for the
filing of the Certificate of Merger,  no filing or consent with any Governmental
Body  or any  other  third  party  is  required  of  Ionatron  or  the  Ionatron
Stockholders  to  consummate  this  Agreement or the  transactions  contemplated
hereby.

      3.6   Governmental  Authorizations.  Schedule  3.6 contains a complete and
accurate  list of each  Governmental  Authorization  that is held by Ionatron or
that otherwise relates to the


                                       4


business  of, or to any of the assets owned or used by,  Ionatron.  Ionatron has
made available to USHG, Blank Rome LLP, or to USHG's authorized  representative,
true and complete copies of all such Governmental Authorizations,  except to the
extent prohibited or otherwise restricted by such Government Authorization,  any
Government  Contract (as defined in Section  3.9),  any  Government  Body or any
Government  Bid (as defined in Section  3.9).  Each  Governmental  Authorization
listed or required  to be listed in Schedule  3.6 is valid and in full force and
effect.  No event has occurred or circumstance  exists that may (with or without
notice or lapse of time) (i)  constitute  or result  directly or indirectly in a
violation of or a failure to comply with any term or requirement of any material
Governmental  Authorization  listed or required to be listed in Schedule 3.6, or
(ii) result  directly or indirectly in the revocation,  withdrawal,  suspension,
cancellation,   or  termination  of,  or  any   modification  to,  any  material
Governmental  Authorization listed or required to be listed in Schedule 3.6. The
Governmental  Authorizations listed in Schedule 3.6 collectively  constitute all
of  the  Governmental  Authorizations  necessary  to  permit  Ionatron  and  its
employees to lawfully conduct and operate Ionatron's  respective business in the
manner  currently  conducted and operated and to permit  Ionatron to own and use
its assets in the manner in which it currently owns and uses such assets.

      3.7   Real  Property.  Ionatron does not own any real property or have any
Real Property  Interests  other than the lease  described on Schedule 3.7, which
lease of  property  is  suitable  for the  conduct of  Ionatron's  business  and
operations as now conducted. Ionatron is not and, to its Knowledge, the landlord
of its leased  premises  is not,  in default,  violation,  or breach  under said
lease, and no event has occurred and is continuing that constitutes (with notice
or  passage  of time or both) a  default,  violation,  or breach  thereunder  by
Ionatron or to Ionatron's Knowledge, the landlord. Ionatron has not received any
notice of a default under said lease. Ionatron has delivered a true and complete
copy of said lease to USHG.  Ionatron has, to date,  enjoyed quiet enjoyment and
practical  access to the  premises  subject  to the lease.  The leased  premises
(including  the  improvements  thereon):  (a) is in good  condition  and  repair
consistent  with its current use; and (b) is available  for immediate use in the
conduct of  Ionatron's  business and  operations.  To Ionatron's  Knowledge,  no
eminent  domain or  condemnation  proceedings  are  pending or  threatened  with
respect to the leased premises.

      3.8   Tangible Personal Property. Schedule 3.8 lists the material Tangible
Personal  Property  owned or leased by  Ionatron.  Ionatron  owns or leases  all
Tangible  Personal  Property  necessary  to  conduct  Ionatron's   business  and
operations as now conducted.  Without material exception,  Ionatron owns and has
good title to each item of Tangible  Personal  Property owned by it, and none of
such  Tangible  Personal  Property  owned by  Ionatron  is subject to any Liens,
except  for  Permitted   Encumbrances.   With  allowance  for  normal   repairs,
maintenance,  wear, and  obsolescence,  each material item of Tangible  Personal
Property  is in  good  operating  condition  and  repair  and is  available  for
immediate use in Ionatron's business and operations.

      3.9   Contracts.

            (a)   Schedule  3.9(a)  lists  all  written  Contracts  and true and
complete  descriptions of all oral Contracts (including any amendments and other
modifications  to such  Contracts).  All of the  Contracts are in full force and
effect  and are  valid,  binding,  and  enforceable  against  Ionatron  and,  to
Ionatron's  Knowledge,  in full force and effect as to, and valid,  binding  and
enforceable  against the other party(ies) thereto in accordance with their terms


                                       5


except  (a)  as  the  enforceability  of  such  Contracts  may  be  affected  by
bankruptcy,  insolvency,  or similar laws affecting  creditors' rights generally
and by judicial discretion in the enforcement of equitable remedies,  and (b) to
the extent any  Government  Contract (as defined in Subsection  3.9(b)(xii))  is
subject to termination,  renegotiation  or modification by its terms or pursuant
to any Order, Governmental Authorization or Legal Requirement.  Ionatron is not,
and to Ionatron's  Knowledge,  no other party  thereto is, in material  default,
violation, or breach in any respect under any Contract and no event has occurred
and is continuing  that  constitutes  (with notice or passage of time or both) a
material default, violation, or breach in any respect thereunder by Ionatron or,
to  Ionatron's  Knowledge,  the  other  party(ies)  thereto.  Other  than in the
Ordinary  Course of Business,  no party to any Contract has delivered  notice of
any intention to terminate such Contract or amend the terms  thereof.  Except as
set forth in Schedule 3.9(a) or as may occur in the Ordinary Course of Business:
to the Knowledge of Ionatron, (a) no Person has or may acquire any rights under,
and no Person has or may become  subject to any  obligation or liability  under,
any Contract that relates to the business of, or any of the assets owned or used
by Ionatron,  except as and to the extent any such Contract  permits  assignment
hereof; and (b) no officer, director, agent, employee, consultant, or contractor
of Ionatron is bound by any Contract  that purports to limit the ability of such
officer,  director, agent, employee,  consultant, or contractor to (i) engage in
or continue  any  conduct,  activity,  or practice  relating to the  business of
Ionatron,  or (ii) assign to  Ionatron or to any other  Person any rights to any
invention, improvement, or discovery.

            (b)   Except as set forth in Schedule 3.9(b):

                  (i) With respect to any Government Contract or Government Bid,
(A) Ionatron has complied in all material  respects with all material  terms and
conditions  of each  Government  Contract or  Government  Bid;  (B) Ionatron has
complied with all material  requirements  of all applicable  laws,  regulations,
written  directives,  or agreements  pertaining to each  Government  Contract or
Government Bid and to Ionatron `s performance on its Government  Contracts;  and
(C) all material  representations and certifications  executed,  acknowledged or
set forth in, or pertaining to each Government  Contract or Government Bid were,
when given, and to the extent any such representation or certification  pertains
to future events which have yet to occur are  presently  complete and correct in
all material respects,  and Ionatron has complied, in all material respects with
all such representations and certifications.

                  (ii)  As of the  date  of  this  Agreement,  Ionatron  has not
received from a party to a Government  Contract any written  show-cause  notice,
stop work order, cure notice, notice of termination, or termination concerning a
Government Contract.

                  (iii)   Ionatron   has  not   received   a  written   negative
determination of responsibility concerning a Government Bid.

                  (iv) Ionatron has no Knowledge of a request by any  Government
Authority for a contract price adjustment including,  without limitation,  based
upon (A) a claim by any  Government  Authority of  defective  pricing or (B) any
cost incurred by Ionatron that has been questioned,  challenged or disallowed or
has been the subject of any investigation, and no money due to Ionatron has been
(or has been attempted to be) withheld or set off with respect to


                                       6


any Government  Contract,  which contract price adjustment,  withheld or set off
amount is reasonably expected to have a Ionatron Material Adverse Effect.

                  (v) To Ionatron's  Knowledge,  neither  Ionatron nor or any of
its   directors,   officers,   employees,   consultants   or   agents  is  under
administrative,  civil or criminal  investigation,  indictment or information or
equivalent official government charge or allegation by any Government  Authority
with respect to any alleged irregularity, misstatement or omission arising under
or relating to any  Government  Contract or  Government  Bid.  Ionatron  has not
conducted or initiated any internal investigation or made a voluntary disclosure
to the U.S. Government with respect to any alleged  irregularity,  misstatement,
omission or other  matter in  connection  with any  Government  Contract  and/or
Government Bid. To Ionatron's Knowledge, there is no irregularity,  misstatement
or omission or other matter arising under or relating to any Government Contract
or Government Bid that has led or could  reasonably be expected to lead,  either
before or after the Closing, to a Material Adverse Effect to Ionatron.

                  (vi) There exist (A) no  outstanding  claims or  requests  for
equitable  adjustment or other  contractual  action for relief against Ionatron,
either by a  Government  Authority  or by any prime  contractor,  subcontractor,
vendor or other  Person,  arising or  relating  to any  Government  Contract  or
Government  Bid, and (B) no disputes  between  Ionatron and the U.S.  Government
under the Contract  Disputes Act of 1978,  as amended  (the  "Contract  Disputes
Act") or between  Ionatron and any prime  contractor,  subcontractor,  vendor or
other person arising under or relating to any Government  Contract or Government
Bid. To Ionatron's  Knowledge,  there are no fact(s) which  constitute the basis
for and could  reasonably  be  expected  to result in a claim or  dispute  under
clause  (A) or  (B)  of the  immediately  preceding  sentence.  Ionatron  has no
interest in any pending or potential  material claim under the Contract Disputes
Act against the U.S. Government or any prime contractor, subcontractor or vendor
arising under or relating to any Government Contract or Government Bid.

                  (vii) To Ionatron's Knowledge, neither Ionatron nor any of its
directors, officers, employees, consultants or agents, is (or for the last three
years has been) suspended or debarred or proposed to be suspended or debarred or
declared ineligible from doing business with any Government  Authority or is the
subject of a finding of  nonresponsibility or ineligibility for contracting with
any Government  Authority.  To Ionatron's  Knowledge,  no facts or circumstances
exist  that  would  warrant  or  could  reasonably  lead to the  institution  of
suspension  or  debarment  proceedings  or the finding of  nonresponsibility  or
ineligibility on the part of Ionatron or any such director,  officer,  employee,
consultant or agent.

                  (viii) The cost accounting  systems with respect to Government
Contracts of Ionatron are in  compliance  in all material  respects with all the
requirements  set forth in, and Legal  Requirements  governing,  such Government
Contracts.

                  (ix) It has  engaged  in no  conduct  that  could  lead to the
imposition of material liability  relating to mischarging,  fraud, false claims,
false certifications, and the Foreign Corrupt Practices Act of 1977, as amended.


                                       7


                  (x) Ionatron has complied in all material respects with all of
its obligations under Government  Contracts relating to any government furnished
property or similar  property  or  equipment  owned by the United  States or any
contractor.

                  (xi)  Ionatron is not in material  violation  of (A) any laws,
directives,  or regulations relating to security clearances of the protection of
classified information; (B) its security agreements relating thereto; or (C) any
laws, directives, or regulations relating to export controls.

                  (xii)  For the  purposes  of  this  Agreement,  (i)  the  term
"Government Bid" shall mean any written  quotations,  bids or proposals that, if
accepted,  would bind any Person to perform the resultant Government Contract to
furnish  products  or services to (A) any  Government  Authority,  (B) any prime
contractor of any Government  Authority,  or (C) any subcontractor,  at any tier
level,  to any  contract  described  in clauses (A) or (B) above;  (ii) the term
"Government Contract" shall mean a written,  mutually binding legal relationship
with (A) any Government  Authority,  (B) any prime  contractor of any Government
Authority,  or  (C)  any  subcontractor,  at any  tier  level,  to any  contract
described  in clauses  (A) or (B) above  which  obligates  any Person to furnish
products or services to a Government Authority,  to which Ionatron is a party on
or as of the Closing Date; and (iii) the term "Government  Authority" shall mean
the  U.S.   Government  and  any  and  all  agencies,   commissions,   branches,
instrumentalities and departments thereof.

                  (xiii)  Schedule  3.9(b) sets forth a list and  description of
each final audit,  inspection or  investigation,  or in the absence  thereof,  a
draft  thereof,  received  by  Ionatron  and  performed  by or for any  prime or
higher-tiered  contractor or subcontractor,  or Government Authority,  including
the Defense Contract Audit Agency, the Defense Contract Management Command,  the
Defense Contract  Administration  Service  Management Area, the Defense Criminal
Investigative  Service,  any government  agencies  under the  supervision of the
Secretary of Defense,  any investigative  agency,  the Defense Security Service,
any Inspector  General,  the Department of Justice,  the Department of State, or
the General  Accounting Office (other than routine audits by resident  auditors,
none of which is material to the  business of  Ionatron).  Schedule  3.9(b) also
briefly describes the current status of such matters.

                  (xiv)  Schedule  3.9(b) sets forth a list and  description  of
each settlement agreement  concerning  Government Contracts between Ionatron and
the U.S.  Government which currently has or is expected to have a binding effect
on  Ionatron  after the Closing  Date,  and under which  Ionatron  has  material
unperformed obligations with respect thereto.

      3.10  Intangibles.  Schedule  3.10  is a true  and  complete  list  of all
material Intangibles owned or used by Ionatron in its business and operations as
now conducted. Without material exception, Ionatron owns or has the right to use
all Intangibles  required for the conduct of Ionatron's  business and operations
as now  intended.  Ionatron has  provided or made  available to the USHG Parties
correct and complete  copies of all documents  establishing  or  evidencing  the
Intangibles  listed on Schedule 3.10,  and evidencing  ownership or the right to
use  same,  except to the  extent  prohibited  or  otherwise  restricted  by any
Governmental  Authorization,  Government  Contract,  Governmental  Body or Legal
Requirement.  Ionatron  is the sole owner of or has the lawful  right to use the
Intangibles. Except as set forth on Schedule 3.10, (a) Ionatron has not


                                       8


received any notice or demand  alleging that it is infringing  upon or otherwise
acting adversely to any trademarks,  service marks, trade names,  service names,
copyrights, patents, patent applications,  know-how, methods, processes or other
intellectual property of any other Person, and there is no claim,  proceeding or
action pending or threatened with respect thereto; (b) to Ionatron's  Knowledge,
no Person is  infringing  upon  Ionatron's  rights or ownership  interest in the
Intangibles;  (c) to Ionatron's Knowledge,  Ionatron is not improperly using any
trade secrets, or improperly using any confidential information about any of its
past or present employees;  and (d) to Ionatron's  Knowledge,  the ownership and
use of such  Intangibles  does not,  and will not as a result  of the  continued
operation of the business as presently  conducted and  presently  proposed to be
conducted, violate any law, statute, ordinance or regulation,  including without
limitation  those  concerning the export or import of the Intangibles from or to
any  jurisdiction,  and none of the  Intangibles  are subject to any outstanding
order,  decree,  judgment,  stipulation or any lien,  security interest or other
encumbrance  whatsoever.  With respect to each Intangible  license,  sublicense,
agreement,  or permission (a) neither  Ionatron nor to its Knowledge,  the other
party(ies) to the license,  sublicense,  agreement, or permission is in material
breach or default,  and no event has occurred which with notice or lapse of time
would   constitute  a  material   breach  or  default  or  permit   termination,
modification,   or  acceleration  thereunder;  (b)  no  party  to  the  license,
sublicense,  agreement,  or permission has repudiated any provision thereof; and
(c) with respect to each  sublicense,  the  representations  and  warranties set
forth in subsections  (a) and (b) above are true and correct with respect to the
underlying  license.  To  Ionatron's  Knowledge,  no portion  of any  Intangible
contains  any "back  door,"  "time bomb,"  "Trojan  horse,"  "worm,"  "drop dead
device,"  "virus" or other  software  routine,  code,  or  program  or  hardware
component  that permits  unauthorized  access to or use of or disables or erases
software, hardware, or data without the consent of the user, or that is intended
or designed to do so.

      3.11  Financial  Statements.  Ionatron has  delivered to USHG  preliminary
unaudited  financial  statements,  including  the balance  sheet,  statement  of
income,  changes in  stockholder's  equity and cash flow statements for the year
ended  December  31, 2003,  which  financial  statements  are under audit by BDO
Seidman,  independent public accountants (the "Financial  Statements").  Each of
the foregoing Financial Statements (including,  in all cases, the notes thereto,
if any) (i) was accurate  and  complete in all material  respects as of the date
thereof, (ii) fairly presented the financial condition and results of operations
of Ionatron set forth therein,  and (iii) were prepared in accordance  with GAAP
applied on a consistent basis  throughout the period covered thereby.  Except as
set forth in Schedule  3.11,  Ionatron has no  liabilities or obligations of any
nature (whether known or unknown and whether absolute,  accrued,  contingent, or
otherwise,  including,  without limitation,  any capital commitments) except for
liabilities  or  obligations  reflected  or  reserved  against in the  Financial
Statements and liabilities incurred in the Ordinary Course of Business since the
dates thereof.  No off-balance sheet  transactions  exist in which Ionatron is a
party.

      3.12  Tax Matters.

            (a)   Ionatron has filed all Tax Returns  required to be filed.  All
such Tax Returns were correct and complete and have been  prepared in compliance
in all material  respects with all applicable  laws and  regulations.  All Taxes
owed by  Ionatron  (whether  or not shown on any Tax  Return)  have  been  paid.
Ionatron  currently is not the beneficiary of any extension of time within which
to file any Tax Return.  No claim has ever been made by a Governmental


                                       9


Body in a  jurisdiction  where Ionatron does not file Tax Returns that it may be
subject  to  taxation  by that  jurisdiction.  There  are no Liens on any of the
Assets of  Ionatron  that  arose in  connection  with any  failure  (or  alleged
failure) to pay any Tax.

            (b)   Ionatron has withheld and paid all Taxes required to have been
withheld and paid in  connection  with  amounts  paid or owing to any  employee,
independent contractor, creditor, stockholder or other Person for whom Taxes are
required to be withheld and paid for all periods for which the statutory  period
of  limitations  for the  assessment of such Tax has not yet expired and all IRS
Forms W-2 and 1099  required with respect  thereto have been properly  completed
and timely filed.

            (c)   No   foreign,   federal,   state  or  local   Tax   audits  or
administrative  Tax  proceedings  are pending or being conducted with respect to
Ionatron.  Neither Ionatron nor any director or officer (or employee responsible
for Tax matters) of Ionatron has received  from any foreign,  federal,  state or
local Taxing Authority (including jurisdictions where Ionatron has not filed Tax
Returns) any (i) notice  indicating  an intent to open an audit or other review;
(ii)  request  for  information  related  to Tax  matters;  or (iii)  notice  of
deficiency or proposed  adjustment  for any amount of Tax proposed,  asserted or
assessed by any Taxing Authority against Ionatron.

            (d)   Schedule 3.12 (i) lists all federal,  state, local and foreign
Tax Returns  filed with  respect to Ionatron  for taxable  periods  ending on or
after  December  31,  2002;  (ii)  indicates  those Tax  Returns  that have been
audited; and (iii) indicates those Tax Returns that currently are the subject of
an audit. Correct and complete copies of all material federal,  state, local and
foreign income Tax Returns,  examination reports, and statements of deficiencies
assessed against,  or agreed to by, Ionatron filed or issued since its inception
have been provided to USHG;

            (e)   Ionatron  has not (i) waived any  statute  of  limitations  in
respect of any Tax which has  continuing  effect or (ii) agreed to any extension
of time with respect to a Tax assessment or deficiency which has not expired;

            (f)   The unpaid Taxes of Ionatron did not, as of December 31, 2003,
exceed the reserve for Tax liability (rather than any reserve for deferred Taxes
established to reflect timing differences between book and Tax income) set forth
on the face of the  Financial  Statements  and (ii) do not exceed the reserve as
adjusted for the passage of time through the Closing Date in accordance with the
past  customs and  practice of  Ionatron  in filing its Tax  Returns.  Since its
inception,  Ionatron  has not  incurred  any  liability  for Taxes  arising from
extraordinary gains or losses, as the term is used in GAAP, outside the ordinary
course of business consistent with past custom and practice.

            (g)   Ionatron has  disclosed on its federal  income Tax Returns all
positions taken therein that could give rise to a substantial  understatement of
federal income Tax within the meaning of Section 6662 of the Code.

            (h)   Ionatron  (i) is not  and  has  not  been a  party  to any Tax
allocation  or sharing  agreement or (ii) has not been a member of an Affiliated
Group (as defined in Section 1504(a) of the Code) filing a consolidated  federal
income Tax Return (other than a group the common


                                       10


parent of which is  Ionatron)  or has a liability  for Taxes of any person under
Treasury  Regulation  Section 1.1502-6 (or any similar provision of state, local
or foreign law), as a transferee or successor, by contract or otherwise.

            (i)   Ionatron has not been a United  States real  property  holding
corporation  within  the  meaning of Section  897(c)(2)  of the Code  during the
applicable period specified in Section 897(c)(1)(A)(ii) of the Code.

            (j)   There is no contract,  agreement, plan or arrangement covering
any persons that,  individually or collectively,  could give rise to the payment
of any amount  that  would not be  deductible  by reason of Section  280G of the
Code, or would constitute compensation in excess of the limitations set forth in
Section 162(m) of the Code.

            (k)   Ionatron has not been the "distributing  corporation"  (within
the meaning of Section  355(a)(1) of the Code) nor the "controlled  corporation"
(within the meaning of Section 355(a)(1) of the Code) within the two-year period
ending as of the date of this Agreement.

            (l)   Ionatron has disclosed to the Internal  Revenue Service on the
appropriate Tax Returns any Reportable Transaction in which it has participated.
Ionatron  has  retained  all  documents  and  other  records  pertaining  to any
Reportable  Transaction in which it has  participated,  including  documents and
other records listed in Treasury  Regulation  Section  1.6011-4(g) and any other
documents or other records which are related to any  Reportable  Transaction  in
which  it has  participated  but  not  listed  in  Treasury  Regulation  Section
1.6011-4(g).

            (m)   Except as provided for on Schedule 3.12,  Ionatron will not be
required  to include  any item of income in, or  exclude  any item of  deduction
from,  taxable income for any taxable period (or portion  thereof)  ending after
the  Closing  Date as a result of any:  (i)  change in  accounting  method for a
taxable  period ending on or prior to the Closing Date under  Section  481(a) of
the Code (or any corresponding  provision of state,  local or foreign income Tax
law); (ii) "closing  agreement" as described in Section 7121 of the Code (or any
corresponding  provision  of state,  local or  foreign  income  Tax law);  (iii)
installment sale or open transaction disposition made on or prior to the Closing
Date; or (iv) prepaid amount received on or prior to the Closing Date.

            (n)   From its inception  through December 31, 2003,  Ionatron was a
Subchapter  S  corporation  within the meaning of Sections  1361 and 1362 of the
Code and any comparable and applicable provision of income tax law of each state
and local jurisdiction listed on Schedule 3.12.

      3.13  Insurance.  Ionatron  maintains  insurance  coverage with  reputable
insurers  in such  amounts and  covering  such risks as are in  accordance  with
normal industry practice for companies engaged in businesses  similar to that of
Ionatron  (taking into  account the cost and  availability  of such  insurance).
Schedule  3.13 sets forth a  complete  listing of all  insurance  maintained  by
Ionatron  (indicating  form of  coverage,  name of carrier and broker,  coverage
limits


                                       11


and premium,  whether occurrence or claims made,  expiration dates,  deductibles
and all endorsements).

      3.14 Personnel and Employee Benefits.

            (a)   Employees and Compensation.  Schedule 3.14 contains a true and
complete  list of all  employees  employed by  Ionatron  as of the date  hereof.
Schedule  3.14 also  contains a true and complete  list of all employee  benefit
plans or arrangements  covering the officers and employees employed by Ionatron,
including, with respect to the employees any:

                  (i)  "Employee  welfare  benefit  plan," as defined in Section
3(1) of ERISA (a "Welfare Plan");

                  (ii) "Multiemployer pension plan," as defined in Section 3(37)
of ERISA (a  "Multiemployer  Plan" and,  together  with the Welfare  Plans,  the
"Benefit Plans");

                  (iii)  "Employee  pension benefit plan," as defined in Section
3(2) of ERISA (other than a Multiemployer Plan) (a "Pension Plan");

                  (iv) Employee  plan that is maintained in connection  with any
trust described in Section 501(c)(9) of the Code; and

                  (v)  Employment,   severance,   or  other  similar   contract,
arrangement,  or policy and each plan or arrangement (written or oral) providing
for insurance  coverage  (including  any  self-insured  arrangements),  workers'
compensation,  disability benefits, supplemental unemployment benefits, vacation
benefits,  or  retirement  benefits or  arrangement  for deferred  compensation,
profit-sharing,   bonuses,  stock  options,  stock  appreciation  rights,  stock
purchases,   or  other  forms  of  incentive   compensation  or  post-retirement
insurance,  compensation,  or benefits that is not a Welfare Plan, Pension Plan,
or Multiemployer Plan, (collectively, "Benefit Arrangements").

            (b)   Pension  Plans.  Ionatron  does  not  sponsor,   maintain,  or
contribute  to any Pension  Plan other than any Pension  Plan listed on Schedule
3.14.  Each  Pension  Plan  complies   currently  and  has  been  maintained  in
substantial  compliance  with its terms and,  both as to form and in  operation,
with all  requirements  prescribed  by any and all statutes,  orders,  rules and
regulations that are applicable to such plans, including ERISA and the Code.

            (c)   Welfare  Plans.  Each Welfare Plan complies  currently and has
been  maintained  in  compliance  with  its  terms  and,  both as to form and in
operation,  with all  requirements  prescribed by any and all statutes,  orders,
rules and regulations that are applicable to such plans, including ERISA and the
Code.  Ionatron  does not sponsor,  maintain,  or contribute to any Welfare Plan
that provides  health or death  benefits to former  employees of Ionatron  other
than as required by Section 4980B of the Code or other applicable laws.

            (d)   Benefit  Arrangements.   Each  Benefit  Arrangement  has  been
maintained in compliance with its terms and with the requirements  prescribed by
all statutes,  orders, rules and regulations that are applicable to such Benefit
Arrangement.  Ionatron  is not a  party  to  written  contract  prohibiting  the
termination of any employee.


                                       12


            (e)   Multiemployer  Plans.  Except as disclosed  in Schedule  3.14,
Ionatron has not at any time been a participant in any Multiemployer Plan.

            (f)   Delivery   of  Copies   of   Relevant   Documents   and  Other
Information.  Ionatron has delivered or made available to USHG true and complete
copies of each of the following documents:

                  (i)   Each Welfare Plan and Pension Plan (and, if  applicable,
related trust agreements) and all amendments thereto,  and written  descriptions
thereof that have been distributed to Employees,  all annuity contracts or other
funding instruments; and

                  (ii) Each Benefit Arrangement and written descriptions thereof
that have been distributed to Employees and complete descriptions of any Benefit
Arrangement that is not in writing.

            (g)  Labor  Relations.  Except  as set  forth in  Schedule  3.14(g),
Ionatron is not a party to or subject to any collective  bargaining agreement or
written or oral employment  agreement with any employee.  Except as set forth in
Schedule  3.14(g),  with respect to the employees,  Ionatron has complied in all
material  respects  with  all  laws,  rules  and  regulations  relating  to  the
employment  of  labor,  including  those  related  to wages,  hours,  collective
bargaining,  occupational  safety,  discrimination,  and the  payment  of social
security  and other  payroll  related  taxes,  and has not  received  any notice
alleging  that  Ionatron  has  failed to comply  with any such laws,  rules,  or
regulations.  No proceedings are pending or overtly threatened between Ionatron,
on the one hand, and any employee (singly or  collectively),  on the other hand.
No labor  union or other  collective  bargaining  unit  represents  or claims to
represent any of the employees.  Except as set forth in Schedule 3.14(g),  there
is no union  campaign  being  conducted to solicit  cards from any  employees to
authorize a union to represent  any of the employees of Ionatron or to request a
National  Labor  Relations  Board  certification  election  with  respect to any
employees.

      3.15  Legal Actions and Orders.

            (a)   Except as  disclosed on Schedule  3.15(a),  there is no claim,
legal action, counterclaim,  suit, arbitration, or other legal or administrative
proceeding, or Tax Proceeding pending or overtly threatened, against Ionatron or
relating to the assets  used by  Ionatron,  or the  business  or  operations  of
Ionatron, nor does Ionatron have Knowledge of any basis for the same.

            (b)   There is no Order to which  Ionatron  or the  assets  owned or
used by Ionatron or any of its Subsidiaries,  or to which Ionatron's business or
operations, is subject.

            (c)   No officer or director or, to Ionatron's Knowledge,  agent, or
employee  of  Ionatron  is  subject to any Order that  prohibits  such  officer,
director,  agent,  or employee  from  engaging  in or  continuing  any  conduct,
activity, or practice relating to the business of Ionatron.

      3.16  Environmental Compliance.

            (a)   Except as disclosed on Schedule  3.16:  (i) none of Ionatron's
Tangible Personal Property,  nor, to Ionatron's  Knowledge,  its leased premises
contains (x) any  asbestos,


                                       13


polychlorinated biphenyls or any PCB contaminated oil; (y) any Contaminants; and
(ii) to  Ionatron's  Knowledge,  all of the  Leased  Property  Interests  are in
compliance with applicable Environmental Laws.

            (b)   Ionatron has obtained any Governmental Authorizations that are
required  under all  Environmental  Laws,  and has no  liability,  contingent or
otherwise,  under or arising from any  violation by Ionatron or any third party,
of any Environmental Law.

      3.17  Compliance with Legal Requirements.  Except as set forth in Schedule
3.17:

            (a)   Ionatron  is, and at all times has been,  in  compliance  with
each  material  Legal  Requirement  including  Environmental  Law that is or was
applicable to it or to the conduct or operation of its business or the ownership
or use of any of its assets;

            (b)   No event has  occurred  or  circumstance  exists that (with or
without  notice or lapse of time) (i) may constitute or result in a violation by
Ionatron of, or a failure on the part of Ionatron to comply  with,  any material
Legal  Requirement,  or (ii) may give rise  under any Legal  Requirement  to any
material obligation on the part of Ionatron to undertake,  or to bear all or any
portion of the cost of, any remedial action of any nature; and

            (c)   Ionatron has not  received  any notice or other  communication
(whether  oral or  written)  from  any  Governmental  Body or any  other  Person
regarding  (i) any actual,  alleged,  possible,  or potential  violation  of, or
failure to comply  with,  any Legal  Requirement,  or (ii) any actual,  alleged,
possible,  or  potential  obligation  on the part of  Ionatron  under  any Legal
Requirement  to  undertake,  or to bear all or any  portion  of the cost of, any
remedial action of any nature.

      3.18  Conduct  of  Business  in  Ordinary  Course.  Except as set forth in
Schedule 3.18,  since  December 31, 2003 and through the date hereof,  there has
not been any Material  Adverse Effect involving  Ionatron.  Without limiting the
generality hereof, since that date, Ionatron has not:

            (a)   made any material sale,  assignment,  lease, or other transfer
of  assets  other  than  in  the  Ordinary  Course  of  Business  with  suitable
replacements being obtained therefor;

            (b)   canceled any debts owed to or claims held by Ionatron  outside
the Ordinary Course of Business;

            (c)   made any changes in Ionatron's accounting practices;

            (d)   suffered any material write-down of the value of any assets or
any write-off as uncollectable of any of its accounts receivable;

            (e)   transferred  or granted any right  under,  or entered into any
settlement  regarding  the  breach or  infringement  of,  any  license,  patent,
copyright,  trademark,  trade name, franchise, or similar right, or modified any
existing right;

            (f)   imposed any security interest upon any of its assets, tangible
or intangible;


                                       14


            (g)   made any capital  expenditures  outside the Ordinary Course of
Business;

            (h)   made any capital investment in or any loan to any other Person
outside the Ordinary Course of Business;

            (i)   created, incurred, assumed, or guaranteed more than $20,000.00
in aggregate indebtedness for borrowed money in capitalized lease obligations;

            (j)   made  any or  authorized  any  change  to its  Certificate  of
Incorporation or Bylaws;

            (k)   issued,  sold,  or  otherwise  disposed  of any of its capital
stock, or granted any options,  warrants,  or other rights to purchase or obtain
(including upon conversion, exchange, or exercise) any of its capital stock;

            (l)   declared,  set  aside,  or  paid  any  dividend  or  made  any
distribution  with respect to its capital stock  (whether in cash or in kind) or
redeemed, purchased, or otherwise acquired any of its capital stock;

            (m)   experienced any material damage, destruction, or loss (whether
or not covered by insurance) to its property;

            (n)   made any loan to, or entered into any other  transaction with,
any of its directors,  officers,  and employees  outside the Ordinary  Course of
Business;

            (o)   granted any increase in the base  compensation  of or made any
other change of employment terms for any of its officers, directors or employees
outside the Ordinary Course of Business;

            (p)   made or changed  any Tax  election  or taken any other  action
with respect to Taxes not in the Ordinary Course of Business and consistent with
past practices; or

            (q)   committed to do any of the foregoing.

      3.19  Insolvency  Proceedings.   Ionatron  is  not,  and  its  assets  and
properties are not, the subject of any pending or overtly threatened  insolvency
proceedings  of  any  character,  including,  without  limitation,   bankruptcy,
receivership,  reorganization,  or  composition  with  creditors,  voluntary  or
involuntary. Ionatron has not made an assignment for the benefit of creditors or
taken any action in contemplation of or which would constitute a valid basis for
the institution of any such insolvency proceedings.

      3.20  Accounts Receivable. The accounts receivable shown in the Ionatron's
Financial  Statements  arose in the ordinary course of business and represented,
as of the date of the Financial Statements, bona fide claims against debtors for
services,  licenses  and other  charges.  All  accounts  receivable  of Ionatron
arising  after the date of the  Financial  Statements  through  the date of this
Agreement  arose in the ordinary  course of business and, as of the date of this
Agreement,  and except as set forth on  Schedule  3.20,  are not  subject to any
discount,  contingency,  claim of off-set or  recoupment  or  counterclaim.  The
amount carried for

                                       15


allowances, including, without limitation, markdowns, price protection, bad debt
allowance and reserves,  disclosed in the Financial Statements is, to Ionatron's
Knowledge, as of the date of this Agreement sufficient to provide for any losses
which may be sustained on  realization of the accounts  receivable  shown in the
Financial Statements.

      3.21  Customers and Suppliers; Loss of Business.

            (a)   Schedule 3.21 accurately identifies,  and provides an accurate
and complete  breakdown of the  revenues,  amounts paid to or the value of goods
received  from,  as  applicable  (i)  each  customer  of  Ionatron  that,  since
Ionatron's inception,  individually accounted for more than $50,000 of aggregate
consolidated gross revenues of Ionatron, and (ii) each supplier of Ionatron that
received,  purchase or other  orders from  Ionatron  in an  aggregate  amount in
excess of $50,000 of supplies,  merchandise and other goods and services ordered
by Ionatron.

            (b)   Ionatron has no Knowledge that the  transactions  contemplated
by this  Agreement  will result in any loss of business or  reduction  in volume
with any of the present  suppliers or  customers  of  Ionatron.  There exists no
actual or, overtly  threatened,  termination,  cancellation or limitation of, or
any  adverse  modification  or change  in,  the  business  relationship  between
Ionatron and any material supplier or customer of Ionatron.

      3.22  Relationships  with Related  Persons.  No Related Person of Ionatron
has, or has had, any interest in any property (whether real, personal,  or mixed
and  whether  tangible  or  intangible),  used in or  pertaining  to  Ionatron's
business.  Except as set forth in Schedule  3.22, no Related  Person of Ionatron
is, or has owned (of record or as a beneficial  owner) an equity interest or any
other  financial  or  profit  interest  in, a Person  that has (i) had  business
dealings or a financial  interest in any  transaction  with Ionatron  other than
business  dealings or transactions  conducted in the Ordinary Course of Business
with Ionatron at  substantially  prevailing  market prices and on  substantially
prevailing  market  terms,  or (ii) engaged in  competition  with  Ionatron with
respect to any line of the  products  or  services  of  Ionatron  (a  "Competing
Business") in any market  presently  served by Ionatron  except for ownership of
less than one percent of the outstanding capital stock of any Competing Business
that is publicly  traded on any recognized  exchange or in the  over-the-counter
market. Except as set forth in Schedule 3.22, no Related Person of Ionatron is a
party to any Contract with, or has any claim or right against, Ionatron.

      3.23  Brokers or Finders.  Except as set forth in Schedule  3.23,  neither
Ionatron,  nor the Ionatron  Stockholders,  nor any director,  officer, agent or
employee of Ionatron,  has employed any broker or finder or has incurred or will
incur any broker's,  finder's or similar fees,  commissions or expenses, in each
case in connection with the transactions contemplated by this Agreement.

      3.24  Disclosure.  No  representation  or  warranty  of  Ionatron  or  the
Ionatron  Stockholders  in this Agreement and no statement in the Schedules omit
to state a material fact necessary to make the statements herein or therein,  in
light of the circumstances in which they were made, not misleading.

      3.25  Due  Diligence.  Except as provided in Schedule  3.25,  Ionatron has
provided  to USHG,  Blank  Rome LLP,  counsel to USHG,  or to USHG's  authorized
representative,  all


                                       16


agreements,   certificates,   correspondence  and  other  items,  documents  and
information  requested,  except to the extent prohibited or otherwise restricted
by any Governmental Authorization, Government Contract or Governmental Body.

      3.26  Investment Intent. Each of the Ionatron Stockholders  represents and
warrants to USHG as to himself only that:

            (a)   He  understands  that the  shares  of USHG  Common  Stock  are
"restricted  securities"  within the meaning of Rule 144  promulgated  under the
Securities Act and that the shares have not been registered under the Securities
Act or any other applicable state securities laws ("Other Securities Laws"), and
may not be sold,  transferred  or otherwise  disposed of, except if an effective
registration  statement  is then in  effect or  pursuant  to an  exemption  from
registration under said Act and that USHG is under no obligation to register the
shares of USHG Common Stock under the Securities Act or Other  Securities  Laws,
and that the USHG is not  obligated  to take any  other  action in order to make
compliance with an exemption from the registration  provisions of the Securities
Act or Other  Securities  Laws  available,  except  that,  until Rule  144(k) is
available  to the Ionatron  Stockholders  who continue to own any shares of USHG
Common Stock which can only be sold or disposed of in accordance  with Rule 144,
USHG shall comply with the current public information requirements thereunder so
that the applicable  Ionatron  Stockholder will be able to avail himself of Rule
144 in order to sell or dispose of such shares of USHG Common Stock.

            (b)   He understands that the  certificates  representing the shares
of USHG Common Stock will bear a restrictive  legend  thereon  substantially  as
follows:

            "THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT
            BEEN  REGISTERED  UNDER THE  SECURITIES  ACT OF 1933, AS
            AMENDED (THE "ACT"), OR ANY OTHER APPLICABLE  SECURITIES
            LAWS,  AND ARE  RESTRICTED  SECURITIES  AS THAT  TERM IS
            DEFINED UNDER RULE 144 PROMULGATED  UNDER THE ACT. THESE
            SECURITIES  MAY  NOT  BE  SOLD,  PLEDGED,   TRANSFERRED,
            DISTRIBUTED  OR  OTHERWISE  DISPOSED  OF IN  ANY  MANNER
            UNLESS  THEY  ARE  REGISTERED  UNDER  THE  ACT  AND  ANY
            APPLICABLE  SECURITIES  LAWS,  OR UNLESS THE REQUEST FOR
            TRANSFER  IS  ACCOMPANIED  BY  AN  OPINION  OF  COUNSEL,
            REASONABLY  SATISFACTORY  TO THE  COMPANY,  STATING THAT
            SUCH TRANSFER IS EXEMPT FROM REGISTRATION  UNDER THE ACT
            AND ANY OTHER SECURITIES LAWS."

            (c)   He  understands  that USHG will direct its transfer  agent for
the  USHG  Common  Stock  to  place  a stop  transfer  instruction  against  the
certificates  representing the shares of USHG Common Stock and will instruct its
transfer  agent to refuse to effect any  transfer  thereof  in the  absence of a
registration  statement declared effective by the SEC with respect to


                                       17


the shares of USHG Common Stock or a favorable opinion of counsel,  satisfactory
to USHG, that such transfer is exempt from registration  under the Act and Other
Securities Laws.

            (d)   He has received  copies of the USHG Annual Report on Form 10-K
for the year ended June 30, 2003 and the Quarterly  Reports on Form 10-Q for the
quarters ended  September 30 and December 31, 2003 and all other  documents that
USHG filed with the SEC under  Sections  13,  14(a) and 15(d) of the  Securities
Exchange Act of 1934, as amended  ("Exchange Act"),  subsequent to the filing of
such Form 10-K,  including,  in each case, the exhibits thereto; and that he has
had  the  opportunity  to  review  public   information   concerning  USHG,  and
understands such information.

            (e)   He is an "accredited  investor" within the meaning of Rule 501
of Regulation D promulgated  under the  Securities  Act and is familiar with the
type of risks inherent in the  acquisition  of securities  such as the shares of
USHG  Common  Stock and  that,  by reason of his  knowledge  and  experience  in
financial  and  business  matters in general,  and  investments  of this type in
particular, he is capable of evaluating the merits and risks of an investment in
the shares of USHG Common Stock.

            (f)   He is able to bear the economic  risk of an  investment in the
shares of USHG Common Stock,  including,  without limiting the generality of the
foregoing,  the risk of losing  part or all of his  investment  in the shares of
USHG Common Stock and his  possible  inability to sell or transfer the shares of
USHG Common Stock for an indefinite period of time.

            (g)   He is  acquiring  the shares of USHG Common  Stock for his own
account and for the purpose of investment  and not with a view to, or for resale
in connection with, any distribution within the meaning of the Securities Act or
any Other  Securities Laws, in violation of the Securities Act or any applicable
Other Securities Laws.

            (h)   He  acknowledges  that USHG has relied on the  representations
contained   herein  and  that  the  statutory   basis  for  exemption  from  the
requirements  of  Section  5 of  the  Securities  Act  may  not be  present  if,
notwithstanding such representations,  he is acquiring the shares of USHG Common
Stock for resale or distribution  upon the occurrence or  non-occurrence of some
predetermined event.

                                    SECTION 4
                         REPRESENTATIONS AND WARRANTIES
                               OF THE USHG PARTIES

      The USHG Parties, jointly and severally, represent and warrant to Ionatron
as of the date hereof and as of the Closing Date (except for representations and
warranties  that  speak as of a  specific  date or time,  in  which  case,  such
representations  and  warranties  shall be true and  complete as of such date or
time) as follows:

      4.1   Organization  of USHG and Merger  Sub.  USHG and Merger Sub are each
duly  organized,  validly  existing,  and in good standing under the laws of the
State of  Delaware.  Each other  direct or indirect  subsidiary  of USHG is duly
organized, validly existing, and in good standing under the laws of the state of
its formation.  USHG and each of its  Subsidiaries  has the requisite  corporate
power and authority to own, lease,  and operate its properties,  to carry on its


                                       18


business  where such  properties  are now owned,  leased,  or operated  and such
business is now conducted.  USHG and each of its Subsidiaries is qualified to do
business as a foreign  corporation in the  jurisdictions in which the failure to
so qualify  would have a Material  Adverse  Effect.  Neither USHG nor any of its
Subsidiaries is a participant in any joint venture or partnership with any other
Person with respect to any part of its operations of its business.

      4.2   Capitalization.  The  authorized  capital  stock of USHG consists of
75,000,000  shares of common stock,  par value $0.001 per share,  of which as of
the date hereof 18,001,090 shares are issued and outstanding and 54,772 are held
in treasury,  and 1,000,000 authorized shares of preferred stock, of which there
are no shares  outstanding.  All of the  issued and  outstanding  shares of USHG
Common Stock have been duly  authorized,  validly  issued and are fully paid and
nonassessable. Except as described on Schedule 4.2, (a) no shares of USHG Common
Stock are held in treasury;  (b) there are no other issued or outstanding equity
securities of USHG or other  securities of USHG  convertible or  exchangeable at
any time into equity  securities  of USHG;  (c) there are no  outstanding  stock
appreciation rights, phantom stock rights, profit participation rights, or other
similar rights with respect to any capital stock of USHG. Schedule 4.2 also sets
forth all commitments or obligations  that would require the issuance or sale of
additional  shares  of  capital  stock of USHG at any time  under  any  options,
subscriptions,  warrants,  rights,  or other obligations to purchase USHG Common
Stock.  USHG owns the  Subsidiaries set forth on Schedule 4.2. Other than Golden
West Agri-Products,  Inc., all such Subsidiaries are inactive,  have no material
assets,  no liabilities,  known or unknown,  contingent or otherwise (other than
any  indemnification  obligations  set forth in the Easy Gardener Sale Agreement
(as  defined  below)  which are due to  expire  on  October  29,  2004),  and no
commitments  other than  immaterial  obligations  with  respect to tax  filings,
corporate  maintenance,  and other similar  ongoing  expenses.  USHG has, at all
times,  been a  holding  company,  and all  commercial  activities  of USHG were
conducted by Subsidiaries.

      4.3   Authorization,  Validity and Effect of  Agreements.  USHG and Merger
Sub have the requisite corporate power and authority to execute and deliver this
Agreement and all agreements and documents contemplated hereby. The consummation
by USHG and Merger  Sub of the  transactions  contemplated  hereby has been duly
authorized by all requisite  corporate action. This Agreement  constitutes,  and
all  agreements  and  documents  contemplated  hereby  (when  executed  and duly
delivered  pursuant  hereto)  will  constitute,  the valid and  legally  binding
obligations  of USHG and  Merger  Sub,  enforceable  in  accordance  with  their
respective terms, subject to applicable  bankruptcy,  insolvency,  moratorium or
other  similar laws  relating to  creditors'  rights and general  principles  of
equity.

      4.4   Books and Records.  Except as set forth on Schedule  4.4, the minute
books,  stock  record  books,  and  other  records  of  USHG  and  each  of  its
Subsidiaries,  all of which have been made  available to Ionatron,  are complete
and  correct  in all  material  respects.  The  minute  books  of  USHG  and its
Subsidiaries  contain accurate and complete records in all material  respects of
all  meetings   held  of,  and  corporate   action  taken  by,  the   respective
stockholders,  the respective Board of Directors, and committees of the Board of
Directors of USHG and its Subsidiaries, and no meeting of any such stockholders,
Board of  Directors,  or committee has been held for which minutes have not been
prepared and are not  contained  in such minute  books.  At the Closing,  all of
those books and records  shall be in the  possession  of USHG and  delivered  to
Ionatron's office in Tucson, Arizona.


                                       19


      4.5   Absence of Conflicting Agreements.  As to USHG and its Subsidiaries,
the  execution  and  delivery  of this  Agreement  and the  consummation  of the
transactions  contemplated  by this  Agreement  (with or  without  the giving of
notice, the lapse of time, or both): (a) do not require the consent of any third
party;  (b)  will  not  conflict  with  any  provision  of  the  Certificate  of
Incorporation,  By-Laws, or other organizational documents of USHG or any of its
Subsidiaries; (c) will not conflict with, result in a breach of, or constitute a
default under any applicable Order, Legal Requirement, or ruling of any court or
Governmental Body to which USHG or any of its Subsidiaries is subject;  (d) will
not conflict with, constitute grounds for termination of, result in a breach of,
constitute a default  under,  or  accelerate or permit the  acceleration  of any
performance  required  by the  terms of,  any  material  agreement,  instrument,
license,  or permit to which  USHG or any of its  Subsidiaries  is a party or by
which USHG or any of its Subsidiaries or their respective  assets are bound; and
(e)  will not  create  any Lien  upon  any of the  assets  of USHG or any of its
Subsidiaries  or any of the USHG  Common  Stock.  Except  for the  filing of the
Certificate of Merger and the Schedule 14f-1 Filing (as hereinafter defined) and
a Form D Filing  pursuant to Regulation D of the Securities  Act, no filing with
any  Governmental  Body or any other third party is required to consummate  this
Agreement or the transactions contemplated hereby.

      4.6   SEC Filings; Financial Statements.

            (a)   Since June 30, 2000, USHG has timely filed all forms,  reports
and documents required to be filed by USHG with the SEC (collectively, the "USHG
SEC  Reports").  The USHG SEC  Reports  (a) at the time  filed,  complied in all
material respects with the applicable requirements of the Securities Act and the
Exchange  Act,  as the case may be,  and (b) did not at the time they were filed
(or if amended or  superseded by a subsequent  filing,  then on the date of such
subsequent  filing),  contain any untrue statement of a material fact or omit to
state a  material  fact  required  to be  stated  in such  USHG SEC  Reports  or
necessary in order to make the statements in such USHG SEC Reports, in the light
of the  circumstances  under  which  they  were  made,  not  misleading.  To the
Knowledge of the USHG Parties, there is no information not contained in the USHG
SEC Reports which a reasonable  investor  would  consider  material in making an
investment decision in a similar situation.

            (b)   Each of the consolidated financial statements  (including,  in
each case, any related notes)  contained in the USHG SEC Reports during the last
three fiscal years (the "USHG Financial Statements"), complied as to form in all
material respects with the applicable published rules and regulations of the SEC
with  respect  thereto,  was  prepared  in  accordance  with GAAP  applied  on a
consistent  basis throughout the periods involved (except as may be indicated in
the notes to such financial statements or, in the case of unaudited  statements,
as  permitted by Form 10-Q or 8-K  promulgated  by the SEC),  were  accurate and
complete  in  all  material  respects  and  fairly  presented  the  consolidated
financial  position  of USHG as at the  respective  dates  and the  consolidated
results of its operations and cash flows for the periods indicated,  except that
the unaudited  interim  financial  statements  were or are subject to normal and
recurring year-end adjustments which were not or are not expected to be material
in amount.


                                       20


      4.7   Sale of Operating Assets to Easy Gardener Products, Ltd.; Assets and
Liabilities.

            (a)   On October 29, 2003, USHG completed the sale of  substantially
all of the  assets  of its  material  operating  Subsidiaries  to Easy  Gardener
Products, Ltd. ("Easy Gardener") which included the assignment and assumption of
all operational  liabilities of its material Subsidiaries and all obligations of
USHG  under  the Trust  Preferred  Documents,  pursuant  to that  certain  Asset
Purchase  Agreement  dated as of December 11, 2002,  as amended May 23, 2003 and
July 31, 2003, by and between Easy Gardener  Products Ltd., EYAS  International,
Inc.,  USHG,  Ampro  Industries,  Inc.  and Weed  Acquisition  Corp.  (the "Easy
Gardener Sale Agreement").  The  representations and warranties set forth in the
Easy  Gardener  Sale  Agreement  were true and  correct  as of the dates made or
deemed to have been made as of the date  hereof,  and USHG has not  received any
claim or notice of any  intention to make a claim by Easy Gardener of any breach
of the representations,  warranties or obligations of USHG set forth in the Easy
Gardener Sale Agreement.

            (b)   As of the date  hereof,  USHG and its  Subsidiaries  have only
those assets and those  liabilities set forth on Schedule 4.7. As of the Closing
Date,  USHG  shall  have  (i)  approximately  $10  million  in  cash  (including
approximately  $57,000 in prepayments made on USHG's D&O insurance policy), (ii)
its current  director and officer's  insurance  policy in full force and effect,
(iii) a  $1,600,000  Subordinated  Promissory  Note set  forth in  Schedule  4.7
including  accrued and unpaid interest  thereon or the proceeds  therefrom,  and
(iv)  no  liabilities,  taxes  due or any  other  obligations,  contractual,  or
otherwise,  whether  or not  contingent  or known  or  unknown,  other  than (A)
$500,000 to be paid in partial  settlement  of the  severance  pay due to Kassel
under that certain  Employment  Agreement dated as of April 1, 1996 between USHG
and Kassel (the "Kassel Employment Agreement") and (B) the obligation to pay the
$54,500 annual consulting fee due to Golub Associates,  LLC ("Golub") so long as
Golub  remains  a  shareholder  of USHG,  (C) the  obligations  to Golub and its
affiliates  pursuant to the  agreements  set forth on Schedule 4.7, (D) the USHG
D&O  policy (E) any  indemnification  obligations  of USHG and its  Subsidiaries
pursuant to the Easy Gardener Sale Agreement and (F) any obligations pursuant to
the agreements  governing USHG's Derivative  Securities (as hereinafter defined)
(collectively, the "Permitted Liabilities and Obligations").

            (c) Except as set forth on Schedule  4.7,  since  October 29,  2003,
neither USHG nor any Subsidiaries other than Golden West Agri-Products, Inc. has
engaged in any commercial or other business activities.

      4.8   Tax Matters.

            (a)   USHG and each of its  Subsidiaries  has  timely  filed all Tax
Returns required to be filed. All such Tax Returns were correct and complete and
have been prepared in compliance  in all material  respects with all  applicable
laws and  regulations.  All  Taxes  owed by USHG  and  each of its  Subsidiaries
(whether or not shown on any Tax Return) have been paid. Neither USHG nor any of
its  Subsidiaries  currently is the  beneficiary of any extension of time within
which to file any Tax Return. No claim has ever been made by a Governmental Body
in a jurisdiction  where either USHG or any of its  Subsidiaries do not file Tax
Returns that they may be subject to taxation by that jurisdiction.  There are no
Liens on any of the Assets of either


                                       21


USHG or any of its  Subsidiaries  that arose in connection  with any failure (or
alleged failure) to pay any Tax.

            (b)   USHG and each of its  Subsidiaries  has  withheld and paid all
Taxes required to have been withheld and paid in connection with amounts paid or
owing to any employee,  independent contractor,  creditor,  stockholder or other
Person for whom taxes are  required to be withheld  and paid for all periods for
which the statutory period of limitations for the assessment of such Tax has not
yet expired and all IRS Forms W-2 and 1099  required  with respect  thereto have
been properly completed and timely filed.

            (c)   No   foreign,   federal,   state  or  local   Tax   audits  or
administrative  Tax  proceedings  are pending or being conducted with respect to
USHG or any of its  Subsidiaries.  Neither USHG nor any of its  Subsidiaries nor
any director or officer (or employee responsible for Tax matters) of USHG or any
of its  Subsidiaries  has  received  from any foreign,  federal,  state or local
Taxing Authority  (including  jurisdictions where USHG and its Subsidiaries have
not filed Tax Returns) any (i) notice  indicating  an intent to open an audit or
other  review;  (ii) request for  information  related to Tax matters;  or (iii)
notice of  deficiency  or proposed  adjustment  for any amount of Tax  proposed,
asserted  or  assessed  by  any  Taxing  Authority  against  USHG  or any of its
Subsidiaries.

            (d)   Schedule 4.8 (i) lists all federal,  state,  local and foreign
Tax Returns  filed with respect to USHG or any of its  Subsidiaries  for taxable
periods ending on or after December 31, 2000;  (ii) indicates  those Tax Returns
that have been audited; and (iii) indicates those Tax Returns that currently are
the subject of an audit.  Correct and complete  copies of all material  federal,
state, local and foreign income Tax Returns, examination reports, and statements
of  deficiencies  assessed  against,  or  agreed  to  by,  USHG  or  any  of its
Subsidiaries  filed or issued  since  December  31,  2000 have been  provided to
Ionatron.

            (e)   Neither USHG nor any of its  Subsidiaries  have (i) waived any
statute of limitations in respect of any Tax which has continuing effect or (ii)
agreed to any  extension of time with respect to a Tax  assessment or deficiency
which has not expired;

            (f)   The unpaid Taxes of USHG and its  Subsidiaries  did not, as of
December 31, 2003, exceed the reserve for Tax liability (rather than any reserve
for deferred Taxes  established to reflect timing  differences  between book and
Tax income) set forth on the face of the USHG  Financial  Statements and (ii) do
not exceed the reserve as adjusted  for the passage of time  through the Closing
Date  in  accordance  with  the  past  customs  and  practice  of  USHG  and its
Subsidiaries in filing their Tax Returns.  Since December 31, 2003, neither USHG
nor any of its  Subsidiaries  have incurred any liability for Taxes arising from
extraordinary gains or losses, as the term is used in GAAP, outside the ordinary
course of business consistent with past custom and practice.

            (g)   USHG  and each of its  Subsidiaries  have  disclosed  on their
federal income Tax Returns all positions taken therein that could give rise to a
substantial  understatement  of federal income Tax within the meaning of Section
6662 of the Code.


                                       22


            (h)   Neither USHG nor any of its  Subsidiaries (i) is or has been a
party to any Tax allocation or sharing agreement or (ii) has been a member of an
Affiliated  Group  (as  defined  in  Section  1504(a)  of  the  Code)  filing  a
consolidated  federal income Tax Return (other than a group the common parent of
which  is USHG) or has a  liability  for  Taxes  of any  person  under  Treasury
Regulation Section 1.1502-6 (or any similar provision of state, local or foreign
law), as a transferee or successor, by contract or otherwise.

            (i)   Neither  USHG  nor any of its  Subsidiaries has been a  United
States real property holding corporation within the meaning of Section 897(c)(2)
of the Code during the applicable  period specified in Section  897(c)(1)(A)(ii)
of the Code.

            (j)   There is no contract,  agreement, plan or arrangement covering
any persons that,  individually or collectively,  could give rise to the payment
of any amount  that  would not be  deductible  by reason of Section  280G of the
Code, or would constitute compensation in excess of the limitations set forth in
Section 162(m) of the Code.

            (k)   Neither  USHG  nor  any  of  its  Subsidiaries  has  been  the
"distributing corporation" (within the meaning of Section 355(a)(1) of the Code)
nor the "controlled corporation" (within the meaning of Section 355(a)(1) of the
Code) within the two-year period ending as of the date of this Agreement.

            (l)   USHG  and  each  of  its  Subsidiaries  has  disclosed  to the
Internal   Revenue  Service  on  the  appropriate  Tax  Returns  any  Reportable
Transaction in which it has participated. USHG and each of its Subsidiaries have
retained  all  documents  and  other  records   pertaining  to  any   Reportable
Transaction in which it has participated,  including documents and other records
listed in Treasury  Regulation  Section  1.6011-4(g)  and any other documents or
other records which are related to any  Reportable  Transaction  in which it has
participated but not listed in Treasury Regulation Section 1.6011-4(g).

            (m)   Except as provided for on Schedule  4.8,  neither USHG nor any
of its  Subsidiaries  will be  required  to  include  any item of income  in, or
exclude any item of deduction  from,  taxable  income for any taxable period (or
portion thereof) ending after the Closing Date as a result of any: (i) change in
accounting  method for a taxable  period  ending on or prior to the Closing Date
under Section 481(a) of the Code (or any corresponding provision of state, local
or foreign  income Tax law);  (ii)  "closing  agreement" as described in Section
7121 of the Code (or any  corresponding  provision  of state,  local or  foreign
income Tax law); (iii) installment sale or open transaction  disposition made on
or prior to the Closing Date; or (iv) prepaid amount received on or prior to the
Closing Date.

      4.9   Insurance. USHG  and  each of its  Subsidiaries  maintain  insurance
coverage with reputable  insurers in such amounts and covering such risks as are
in accordance with normal industry  practice for companies engaged in businesses
similar to that of USHG (taking into account the cost and  availability  of such
insurance).  Schedule  4.9  sets  forth  a  complete  listing  of all  insurance
maintained  by USHG and any of its  Subsidiaries  (indicating  form of coverage,
name of carrier and broker,  coverage limits and premium,  whether occurrence or
claims made, expiration dates, deductibles and all endorsements).


                                       23


      4.10 Personnel and Employee Benefits.

            (a)   Employees and  Compensation. Schedule 4.10 contains a true and
complete list of all employees employed by USHG or any of its Subsidiaries as of
the date hereof.  Schedule  4.10 also  contains a true and complete  list of all
employee  benefit  plans or  arrangements  covering the  officers and  employees
employed by USHG or any of its Subsidiaries at any time, including, with respect
to the employees, any:

                  (i)   Welfare Plan;

                  (ii)  Multiemployer Plans;

                  (iii) Pension Plan;

                  (iv)  Employee  plan that is maintained in connection with any
trust described in Section 501(c)(9) of the Code; and

                  (v) Benefit Arrangements.

            (b)   Pension Plans.  Neither  USHG  nor  any  of  its  Subsidiaries
sponsors,  maintains,  or contributes to any Pension Plan other than any Pension
Plan listed on Schedule 4.10. Each Pension Plan complies  currently and has been
maintained in substantial  compliance with its terms and, both as to form and in
operation,  with all  requirements  prescribed by any and all statutes,  orders,
rules and regulations that are applicable to such plans, including ERISA and the
Code.

            (c)   Welfare  Plans.  Each Welfare Plan complies  currently and has
been  maintained  in  compliance  with  its  terms  and,  both as to form and in
operation,  with all  requirements  prescribed by any and all statutes,  orders,
rules and regulations that are applicable to such plans, including ERISA and the
Code.  Neither  USHG  nor  any  of  its  Subsidiaries  sponsors,  maintains,  or
contributes to any Welfare Plan that provides health or death benefits to former
employees of USHG or any of its  Subsidiaries  other than as required by Section
4980B of the Code or other applicable laws.

            (d)   Benefit  Arrangements.   Each  Benefit  Arrangement  has  been
maintained in compliance with its terms and with the requirements  prescribed by
all statutes,  orders, rules and regulations that are applicable to such Benefit
Arrangement.  Neither  USHG nor any of its  Subsidiaries  is a party to  written
contract prohibiting the termination of any employee.

            (e)   Multiemployer  Plans.  Except as  disclosed  in Schedule 4.10,
neither USHG nor any of its  Subsidiaries  has at any time been a participant in
any Multiemployer Plan.

            (f)   Delivery   of  Copies   of   Relevant   Documents   and  Other
Information. USHG has delivered or made available to Iaonatron true and complete
copies of each of the following documents:


                                       24


                  (i)   Each Welfare Plan and Pension Plan (and, if  applicable,
related trust agreements) and all amendments thereto,  and written  descriptions
thereof that have been distributed to Employees,  all annuity contracts or other
funding instruments; and

                  (ii)  Each  Benefit   Arrangement  and  written   descriptions
thereof that have been distributed to Employees and complete descriptions of any
Benefit Arrangement that is not in writing.

            (g)   Prior  Employees.  Except as set forth in Schedule 4.10,  USHG
does not have any obligation to any present or former employee of USHG or any of
its  present  or  former  Subsidiaries,  under any Plan or  Benefit  Arrangement
described in Subsections 4.10(a),  4.10(b) or 4.10(c) or for indemnification for
any matter or in any other respect.

            (h)   Labor Relations. Except as set forth in Schedule 4.10, neither
USHG nor any of its  Subsidiaries  is a party to or  subject  to any  collective
bargaining  agreement or written or oral employment agreement with any employee.
Except as set forth in Schedule 4.10,  with respect to the  employees,  USHG and
each of its Subsidiaries  have complied in all material  respects with all laws,
rules and  regulations  relating to the  employment  of labor,  including  those
related  to  wages,   hours,   collective   bargaining,   occupational   safety,
discrimination,  and the payment of social  security and other  payroll  related
taxes,  and  has  not  received  any  notice  alleging  that  USHG or any of its
Subsidiaries has failed to comply with any such laws, rules, or regulations.  No
proceedings  are  pending  or  overtly  threatened  between  USHG  or any of its
Subsidiaries, on the one hand, and any employee (singly or collectively), on the
other hand. No labor union or other  collective  bargaining  unit  represents or
claims to represent any of the employees.  Except as set forth in Schedule 4.10,
there is no union campaign  being  conducted to solicit cards from any employees
to  authorize a union to  represent  any of the  employees of USHG or any of its
Subsidiaries  or to  request a  National  Labor  Relations  Board  certification
election with respect to any employees.

      4.11  Legal Actions and Orders.

            (a)   Except as disclosed on Schedule 4.11, there is no claim, legal
action,  counterclaim,  suit,  arbitration,  or other  legal  or  administrative
proceeding, or Tax Proceeding pending or overtly threatened, against USHG or any
of its  Subsidiaries  or  relating  to the  assets  used  by  USHG or any of its
Subsidiaries,  or the business or operations of USHG or any of its Subsidiaries,
nor does USHG or any of its  Subsidiaries  have  Knowledge  of any basis for the
same.

            (b)   There is no Order to which USHG or any of its  Subsidiaries or
the assets owned or used by USHG or any of its Subsidiaries,  or to which USHG's
or any of its Subsidiaries' business or operations, is subject; and

            (c)   No  officer  or  director  or, to USHG's  Knowledge,  agent or
employee  of  USHG or any of its  Subsidiaries  is  subject  to any  Order  that
prohibits  such  officer,  director,  agent,  or  employee  from  engaging in or
continuing any conduct,  activity,  or practice relating to the business of USHG
and its Subsidiaries.


                                       25


      4.12  Environmental Compliance.

            (a)   Except as disclosed on Schedule 4.12: (i) none of the Tangible
Personal Property, nor to USHG's Knowledge its leased premises, contains (x) any
asbestos,  polychlorinated  biphenyls  or any  PCB  contaminated  oil;  (y)  any
Contaminants;  and (ii) to USHG's  Knowledge,  all of such Leased Real  Property
Interests  were through  October 29, 2003 and, if still in force  against  USHG,
through the date hereof, in compliance with applicable Environmental Laws.

            (b)   USHG  and  each  of  its   Subsidiaries   have   obtained  all
Governmental  Authorizations that are required under all Environmental Laws, and
USHG has no  liability,  contingent  or  otherwise,  under or  arising  from any
violation  by  USHG,  any  of  its  Subsidiaries  or  any  third  party,  of any
Environmental Law.

      4.13  Compliance with Legal Requirements.  Except as set forth in Schedule
4.13:

            (a)   USHG and each of its  Subsidiaries  are, and at all times have
been,  in   compliance   with  each  material   Legal   Requirement,   including
Environmental  Laws  that  is or  was  applicable  to it or to  the  conduct  or
operation of its business or the ownership or use of any of its assets;

            (b)   No event has  occurred  or  circumstance  exists that (with or
without  notice or lapse of time) (i) may constitute or result in a violation by
USHG or any of its  Subsidiaries  of, or a failure on the part of USHG or any of
its  Subsidiaries  to comply with, any material Legal  Requirement,  or (ii) may
give rise under any Legal Requirement to any material  obligation on the part of
USHG or any of its  Subsidiaries to undertake,  or to bear all or any portion of
the cost of, any remedial action of any nature; and

            (c)   neither  USHG nor any of its  Subsidiaries  has  received  any
notice or other  communication  (whether oral or written) from any  Governmental
Body or any  other  Person  regarding  (i) any  actual,  alleged,  possible,  or
potential  violation of, or failure to comply with,  any Legal  Requirement,  or
(ii) any actual, alleged,  possible, or potential obligation on the part of USHG
or any of its Subsidiaries under any Legal Requirement to undertake,  or to bear
all or any portion of the cost of, any remedial action of any nature.

      4.14  Stock  Issuable in Merger.  The Merger  Consideration,  when issued,
will be duly authorized and validly issued, fully paid and non-assessable,  will
be delivered  hereunder free and clear of any liens,  adverse  claims,  security
interests,   pledges,   mortgages,   charges  and  encumbrances  of  any  nature
whatsoever,  except that the Merger  Consideration shall not be registered under
the  Securities  Act or  any  state  securities  law  and  will  be  "restricted
securities",  as such term is  defined in the rules and  regulations  of the SEC
promulgated  under the Securities  Act, and will be subject to  restrictions  on
transfers pursuant to such rules and regulations.  USHG has reserved an adequate
number  of  shares  of USHG  Common  Stock  to  enable  it to issue  the  Merger
Consideration.

      4.15  Brokers or Finders.  Except as set forth in Schedule  4.15,  neither
USHG nor any of its Subsidiaries,  nor any director,  officer, agent or employee
thereof,  has  employed  any broker


                                       26


or finder or has incurred or will incur any broker's,  finder's or similar fees,
commissions  or  expenses,  in each  case in  connection  with the  transactions
contemplated by this Agreement.

      4.16  Disclosure.  No representation or warranty of USHG in this Agreement
and no statement in the Schedules  omits to state a material  fact  necessary to
make the statements  herein or therein,  in light of the  circumstances in which
they were made, not misleading.

      4.17  Due  Diligence.  USHG  has  provided  to  Ionatron  all  agreements,
certificates,   correspondence  and  other  items,   documents  and  information
requested.

                                    SECTION 5
                                    COVENANTS

      5.1   Procedure for Exchange. Immediately  after the Effective  Time, USHG
shall make appropriate  provision for issuance of certificates  representing the
Merger Consideration against surrender of the Ionatron Common Stock.

      5.2   Conduct of Ionatron's Business Prior to Closing. Except as otherwise
contemplated by this Agreement,  from the date hereof through the earlier of the
termination of this Agreement or the Effective Time,  Ionatron shall conduct its
business in the Ordinary Course of Business.  Without limiting the generality of
the foregoing,  except as  contemplated  by this Agreement or as consented to by
USHG, during the period set forth in the preceding sentence,  Ionatron shall act
as follows:

            (a)   Ionatron   shall  not  adopt  any  change  in  any  method  of
accounting or accounting practice, except as contemplated or required by GAAP;

            (b)   Ionatron shall not amend its Certificate of  Incorporation  or
Bylaws;

            (c)   subject  to  the  fiduciary   obligations   of  its  board  of
directors,  Ionatron shall not merge or  consolidate  with, or agree to merge or
consolidate  with, or purchase or agree to purchase all or substantially  all of
the assets of, or otherwise acquire, any other business entity

            (d)   except  for  the  disposition  of  obsolete  equipment  in the
Ordinary  Course of Business,  Ionatron  shall not sell,  mortgage,  pledge,  or
otherwise  dispose of any assets or  properties  owned,  leased,  or used in the
operation of its business;

            (e)   Ionatron shall not authorize for issuance,  issue, or sell any
additional  shares of its capital stock or issue any  securities or  obligations
convertible or  exchangeable  into shares of its capital stock or issue or grant
any option, warrant, or other right to purchase any shares of its capital stock;

            (f)   Ionatron  shall not  incur,  or agree to  incur,  any debt for
borrowed money;

            (g)   Ionatron  shall not change its historic  practices  concerning
the payment of accounts payable;




                                       27


            (h)   except in the Ordinary Course of Business,  Ionatron shall not
take any action, or fail to take action, to cause its liabilities to increase;

            (i)   Ionatron shall not declare,  issue,  or otherwise  approve the
payment of  dividends  of any kind in respect  of its  capital  stock or redeem,
purchase, or acquire any of its capital stock;

            (j)   Ionatron shall not terminate the existing  insurance  policies
on the assets of its business or other policies providing  substantially similar
coverages;

            (k)  except in the  Ordinary  Course  of  Business  or as  otherwise
contemplated by this  Agreement,  Ionatron shall not permit any increases in the
compensation  of any of its  employees  except as  required  by law or  existing
contract or agreement  or enter into or amend any Welfare  Plan,  Pension  Plan,
Benefit Plan or Benefit Arrangement;

            (l)   except in the Ordinary Course of Business, Ionatron  shall not
enter into or renew,  extend or terminate,  or waive any Contract,  or incur any
obligation that will be binding on Ionatron after Closing;

            (m)   Ionatron  shall  not  enter  into  any  transactions  with any
Affiliate that will be binding upon Ionatron following the Closing Date;

            (n)   Ionatron shall  maintain its  material  assets or replacements
thereof in good operating  condition and adequate  repair,  normal wear and tear
excepted;

            (o)   Ionatron shall not make or change any Tax election,  amend any
Tax Return,  or take or omit to take any other action not in the Ordinary Course
of Business that would have the effect of increasing any Taxes of Ionatron;

            (p)   Ionatron shall file all Tax Returns when due; and

            (q)   Ionatron  shall  preserve  its business and assets and use its
best efforts to keep  available its present  employees  and to preserve  present
relationships  with  their  customers,  employees,  and others  having  business
relations with it.

      5.3   Conduct of USHG's Business  Prior to  Closing.  Except as  otherwise
contemplated by this Agreement,  from the date hereof through the earlier of the
termination of this Agreement or the Effective Time, neither USHG nor any of its
Subsidiaries  other than  Golden  West  Agri-Products,  Inc.  shall  conduct any
business. In addition, without limiting the generality of the foregoing,  except
as  contemplated  by this  Agreement or as consented to by Ionatron,  during the
period set forth in the preceding sentence,  USHG and its Subsidiaries shall act
as follows:

            (a)   neither  USHG  nor any of its  Subsidiaries  shall  adopt  any
change  in  any  method  of  accounting  or  accounting   practice,   except  as
contemplated or required by GAAP;

            (b)   neither USHG  nor  any of its  Subsidiaries  shall  amend  its
Certificate of Incorporation or Bylaws;


                                       28


            (c)   subject  to  the  fiduciary   obligations   of  its  board  of
directors,  neither USHG nor any of its Subsidiaries  shall merge or consolidate
with,  or agree to merge or  consolidate  with, or purchase or agree to purchase
all or  substantially  all of the assets  of, or  otherwise  acquire,  any other
business entity;

            (d)   except for up to 135,000  shares of USHG Common Stock issuable
to David Harper as severance  compensation  upon  termination from USHG prior to
the Closing Date and except as otherwise  set forth in this  Agreement,  neither
USHG nor any of its  Subsidiaries  shall authorize for issuance,  issue, or sell
any  additional  shares  of  its  capital  stock  or  issue  any  securities  or
obligations  convertible  or  exchangeable  into shares of its capital  stock or
issue or grant any option, warrant, or other right to purchase any shares of its
capital stock;

            (e)   neither USHG nor any of its Subsidiaries shall incur, or agree
to incur, any debt for borrowed money;

            (f)   neither USHG nor any of its Subsidiaries shall declare, issue,
or  otherwise  approve  the payment of  dividends  of any kind in respect of its
capital stock or redeem, purchase, or acquire any of its capital stock;

            (g)   USHG and its Subsidiaries shall  not  terminate  the  existing
director's and officer's insurance policy or any other insurance policy Ionatron
notifies USHG to maintain in effect;

            (h)   except in the  Ordinary  Course  of  Business  of  Golden West
Agri-Products,  Inc.  or except as  otherwise  contemplated  by this  Agreement,
neither  USHG nor any of its  Subsidiaries  shall  permit any  increases  in the
compensation  of any of its  employees  except as  required  by law or  existing
contract or agreement  or enter into or amend any Welfare  Plan,  Pension  Plan,
Benefit Plan or Benefit Arrangement;

            (i)   except as  contemplated  by this Agreement and in the Ordinary
Course of Business as regards only Golden West Agri-Products, Inc., neither USHG
nor any of its Subsidiaries shall enter into, amend, renew, extend or terminate,
or waive any Contract,  or incur any obligation  that will be binding on USHG or
any such Subsidiary;

            (j)   except as contemplated by this Agreement, neither USHG nor any
of its Subsidiaries  shall enter into any  transactions,  including any with any
Affiliate  that will be binding upon USHG or any of its  Subsidiaries  following
the Closing Date;

            (k)   USHG and its  Subsidiaries  shall  maintain  their  respective
assets and records in good condition;

            (l)   neither  USHG nor any of its Subsidiaries shall make or change
any Tax election, amend any Tax Return, or take or omit to take any other action
not in the Ordinary  Course of Business that would have the effect of increasing
any Taxes of USHG or any of its  Subsidiaries  or which would  prevent or impede
the merger from qualifying as a tax-free reorganization; and


                                       29


            (m)   USHG and each of its Subsidiaries  shall  file all Tax Returns
when due to the extent such Tax Returns are due prior to the Closing Date.

      5.4   Access to Information.

            (a)   From and after the date of this Agreement  until  the  Closing
Date,  Ionatron shall,  subject to any limitations  imposed by any  Governmental
Authorization, Governmental Body, Government Contract or Government Bid (i) give
the USHG  Parties  and the USHG  Parties'  employees,  accountants  and  counsel
(subject to agreements by such persons to use and treat Confidential Information
described  in  Subsection  5.4(c)  subject  to the  restrictions  set  forth  in
Subsection  5.4(c)),  full and complete  access upon  reasonable  notice  during
normal  business  hours,  to  all  officers,   employees,  offices,  properties,
agreements,  records and affairs of Ionatron to perform its due diligence review
of Ionatron;  (ii) provide the USHG Parties with all  financial  information  of
Ionatron  that  is  distributed  to the  officers  and  directors  of  Ionatron,
including,  but not  limited  to,  the  monthly  internal  financial  statements
prepared by Ionatron  promptly  upon  distribution  of such  information  to the
officers and directors of Ionatron; and (iii) provide copies of such information
concerning Ionatron as the USHG Parties may reasonably request.

            (b)   From and after the date of this Agreement  until  the  Closing
Date,  USHG  shall  (i) give  Ionatron,  the  Ionatron  Stockholders  and  their
employees,  accountants  and counsel  full and complete  access upon  reasonable
notice during  normal  business  hours,  to all  officers,  employees,  offices,
properties,  agreements,  records  and affairs of USHG and its  Subsidiaries  to
perform its due  diligence  review of USHG and its  Subsidiaries;  (ii)  provide
Ionatron with all financial  information  of USHG and its  Subsidiaries  that is
distributed  to the officers and directors of USHG,  including,  but not limited
to, the monthly  internal  financial  statements  prepared by USHG promptly upon
distribution  of such  information  to the officers and  directors of USHG;  and
(iii) provide copies of such information concerning USHG and its Subsidiaries as
Ionatron may reasonably request.

            (c)   All  confidential  information  of a party to which  the other
party  obtains   pursuant  to  this  Section  5.4  shall  deemed   "Confidential
Information"  pursuant to that certain Mutual  Confidentiality  Agreement  dated
February  13,  2004 by and  between  USHG  and  Ionatron  (the  "Confidentiality
Agreement").

      5.5   Merger  Consideration  Adjustment.  If as of the  Closing Date it is
determined  that USHG has cash less than $9.5  million,  net of all  outstanding
liabilities  except  the  Permitted  Liabilities  and  Obligations,  the  Merger
Consideration shall be adjusted so that the Ionatron Stockholders shall receive,
pro rata to the  deficit,  a greater  percentage  of the issued and  outstanding
shares of USHG (on a fully diluted basis).  Such percentage  shall be determined
by subtracting  from 100% the number that is determined by the following  ratio:
$9.5 million over 35% equals the actual USHG cash at closing (as the numerator),
over "X" (as the denominator),  where "X" shall be the aggregate  percentage not
issued to the Ionatron Stockholders pursuant to Section 2.1(f).

      5.6   Kassel Termination; Kassel Closing Shares.


                                       30


            (a)   At the Effective Time, the Kassel  Employment  Agreement shall
be  terminated  and Kassel shall  resign all of his  positions as a director and
officer of USHG and all of its  Subsidiaries.  In lieu of and in satisfaction of
the  substantial  cash  severance  package  payable  to  Kassel  upon the  early
termination of the Kassel Employment  Agreement,  Kassel hereby agrees to accept
(i)  $500,000,   payable  in  immediately  available  funds  (the  "Kassel  Cash
Severance"),  at the Effective  Time,  (ii) 750,000  shares of USHG Common Stock
(the "Kassel Closing Shares"),  (iii) the cancellation and foregiveness of loans
to Kassel by USHG in the principal  amount of $487,000,  plus  interest  accrued
through the Closing Date.

            (b)   Commencing   at  the   Effective   Time,   Howard  and/or  his
assignee(s)  shall have the right to purchase all, but not less than all, of the
Kassel  Closing  Shares for a period of six (6) months  following  the Effective
Time (the "Howard  Option  Period") at a purchase price of $500,000 (the "Howard
Option").  If the Howard Option is not exercised  prior to the expiration of the
Howard Option  Period,  then,  for a period of five business days  following the
expiration of the Howard Option Period, Kassel shall have the right to sell, and
Howard shall have the obligation to purchase or caused to be purchased, all, but
not less than all, of the Kassel Closing Shares at a purchase price of $500,000.

      5.7  Resignation of Employees;  Appointment of Directors and Officers.  At
the Effective  Time,  USHG shall cause all of its employees and the employees of
its Subsidiaries  other than Golden West  Agri-Products,  Inc., and the officers
and  directors  of USHG to resign so as to  effectuate  the  election  of Robert
Howard,  Thomas C.  Dearmin,  David  Hurley,  George  Farley  and  James  Harlan
(collectively,  the "New  Board")  to fill the  vacancies  resulting  from  such
resignations,  to hold office in accordance with applicable law, the Certificate
of Incorporation and By-Laws of USHG until resignation,  removal or replacement.
Robert Howard,  Thomas C. Dearmin,  Stephen William McCahon and Joseph C. Hayden
and such  other  officers  as are  designated  by the New  Board  shall,  at the
Effective  Time,  be duly  nominated  and appointed as Chairman of the Board and
Secretary;   President,   Chief  Executive  Officer,  Chief  Financial  Officer,
Treasurer and  Assistant  Secretary;  Vice  President of  Engineering;  and Vice
President of Business  Development,  respectively,  in each case to serve at the
pleasure of the New Board in accordance  with applicable law, the Certificate of
Incorporation  and By-Laws of USHG until  resignation,  removal or  replacement.
Each  resigning  employee,  officer and director  shall execute a release of all
claims and future rights  against  USHG,  except as relates to option or warrant
agreements  which are  intended  to  continue  after the  Closing  and  benefits
available under director and officer liability insurance.

      5.8 USHG  Derivative  Securities.  All  issued  and  outstanding  options,
warrants,  or other  rights,  contracts  or  commitments  to  purchase or obtain
(including upon conversion,  exchange,  or exercise) any of USHG's capital stock
(collectively,  "Derivative  Securities") shall remain in full force and effect,
notwithstanding any provisions under the respective agreements or plan governing
such derivative  securities which call for their termination upon termination of
any employee, officer or director relationship with USHG; provided however, that
prior to the  Effective  Time,  with the  exception of the warrants set forth on
Schedule 4.7, all of the agreements governing such USHG's Derivative  Securities
will be amended to provide  (i) they are fully  vested,  and (ii) that they will
expire on the fifth  anniversary  of the Effective Date and (iii) that they will
be exercisable on a "cashless basis."


                                       31


      5.9   Sale of Golden West  Agri-Products,  Inc.  The parties  hereto shall
negotiate  in  good  faith  for the  sale of all of the  stock  of  Golden  West
Agri-Products,  Inc.,  a Subsidiary  of USHG,  to Kassel,  for a purchase  price
consistent  with the Valuation  Analysis (as  hereinafter  defined) (the "Golden
West Sale").  The Golden West Sale shall close  simultaneously  with the Closing
and the cash  proceeds  of such  sale  shall be  included  for the  purposes  of
calculating USHG's cash at Closing.

      5.10  Partial  Conversion  and  Repayment of Howard  Note.  On or prior to
Closing (i) Howard  shall  convert $2 million of the total amount owed to Howard
by Ionatron pursuant to that certain Convertible Promissory Note dated March 15,
2003,  of Ionatron  in favor of Howard (the  "Howard  Note"),  in the  principal
amount of $5.1 million into Ionatron Common Stock (without increasing the Merger
Consideration)  and (ii) Ionatron may repay $300,000 of the principal  amount of
the Howard Note.

      5.11  Amendment  to Howard  Note.  On or prior to the  Closing  Date,  the
Howard Note shall be amended to (i) remove its convertibility feature so that it
is no longer  convertible into Ionatron Common Stock, (ii) restrict repayment as
provided in Section 5.12, (iii) reduce the revolving credit amount thereunder to
$3 million and (iv) provide that interest payable  thereunder shall be made on a
quarterly basis.

      5.12  Restrictions  on  Payments  under  Howard  Note.  From and after the
Closing Date,  no repayment of principal  shall be made under the Howard Note or
any other loan from Howard to Ionatron or USHG if and to the extent and only for
so long as such payment would, in the judgment of the Board of Directors of USHG
(i) impair the ability of the  Surviving  Corporation  or USHG to operate  their
respective  businesses,  (ii) cause the Surviving  Corporation or USHG to borrow
funds to be used for working  capital or (iii) in the event USHG Common Stock is
trading on the Nasdaq National Market System or the NASDAQ SmallCap System, such
payment would cause, or be reasonably  likely to cause, the USHG Common Stock to
no longer  qualify for  trading on such  system or  exchange or would  otherwise
impair or adversely impact such listing.

      5.13  Termination  of  all  USHG  Obligations  and  Release  of  all  USHG
Liabilities.  Prior to the  Closing,  USHG shall take all actions  necessary  to
terminate  all of USHG's  contractual  obligations  and to obtain the release of
USHG and all of its Subsidiaries other than Golden West Agri-Products, Inc. from
all  their  respective   liabilities,   with  the  exception  of  the  Permitted
Liabilities and Obligations.

      5.14  Indemnification  and  Insurance.  Following the Closing  Date,  USHG
shall (i) indemnify the former  members of its Board of Directors to the fullest
extent provided by USHG's  Certificate of Incorporation,  Bylaws and Section 145
of Delaware  General  Corporation  Law,  (ii) shall use its best efforts to list
such former  directors as  additionally  insured parties on USHG's D&O insurance
policy and (iii) during all periods of time during which the Representatives (as
defined in Section  9.4) have  obligations  under this  Agreement,  use its best
efforts to name such  Representatives as additional insured parties under USHG's
D&O insurance policy or any other insurance policy of USHG;  provided,  however,
USHG shall not be  required  to incur any  additional  expense  with  respect to
complying with items (ii) and (iii).


                                       32


      5.15  Consummation  of  Transaction.  Each of the  parties  hereto  hereby
agrees  to use its  commercially  reasonable  efforts  to cause  all  conditions
precedent to its obligations (and to the obligations of the other parties hereto
to consummate the transactions contemplated hereby) to be satisfied,  including,
but not  limited to,  using all  commercially  reasonable  efforts to obtain all
required  (if so  required by this  Agreement)  consents,  waivers,  amendments,
modifications,  approvals,  authorizations,  novations and  licenses;  provided,
however,  that  nothing  herein  contained  shall be deemed to modify any of the
absolute obligations imposed upon any of the parties hereto under this Agreement
or any agreement executed and delivered pursuant hereto.

      5.16  Cooperation/Further Assurances.

            (a)   Each of the parties  hereto hereby  agrees to fully  cooperate
with the other parties hereto in preparing and filing any notices, applications,
reports and other  instruments and documents which are required by, or which are
desirable  in the  reasonable  opinion of any of the  parties  hereto,  or their
respective  legal  counsel,  in respect of, any Legal  Requirement in connection
with the transactions contemplated by this Agreement.

            (b)   Each of the parties  hereto hereby  further agrees to execute,
acknowledge,  deliver,  file and/or  record,  or cause such other parties to the
extent  permitted by law to execute,  acknowledge,  deliver,  file and/or record
such other  documents as may be required by this Agreement and such parties,  or
their respective  legal counsel may reasonably  require in order to document and
carry out the transactions contemplated by this Agreement.

      5.17 Notice of Developments.  Each of the parties hereto shall give prompt
written notice to the other Parties of any material adverse  development causing
a breach of any of its own  representations  and  warranties  in  Section 3, and
Section 4 above.  No  disclosure  by any Party  pursuant to this  Section  5.17,
however,  shall be deemed to amend or supplement the  Disclosure  Schedule or to
prevent or cure any misrepresentation, breach of warranty or breach of covenant.

      5.18  Shareholder  Questionnaires;  Schedule 14f-1 Filing. USHG has caused
to be filed a Schedule 14f-1 with respect to the Ionatron  Stockholders pursuant
to Rule 14f-1 of the Exchange Act (the "Schedule 14f-1  Filing").  Each Ionatron
Stockholder has provided USHG with a completed Shareholder  Questionnaire,  in a
form  reasonably  acceptable  to USHG,  providing the  information  necessary to
complete the Schedule 14f-1 Filing.

                                    SECTION 6
                    CONDITIONS TO OBLIGATIONS OF THE PARTIES

      6.1   Conditions to  Obligations of the USHG Parties.  All  obligations of
the  USHG  Parties  to  consummate   the  Merger  and  the  other   transactions
contemplated by this Agreement are subject,  at the USHG Parties' option, to the
fulfillment  or waiver prior to or at the Closing Date of each of the  following
conditions:

            (a)   Representations   and  Warranties.   All  representations  and
warranties of Ionatron contained in this Agreement shall be true and complete at
and as of the  Closing  Date as


                                       33


though made at and as of that time (except for  representations  and  warranties
that speak as of a specific date or time which need only be true and complete as
of such date or time).

            (b)   Covenants   and   Conditions.   Ionatron   and  the   Ionatron
Stockholders  shall have performed and complied with all  covenants,  agreements
and  conditions  required by this  Agreement to be performed or complied with by
them prior to or on the Closing Date.

            (c)   No Litigation.  No action, suit or proceeding against Ionatron
relating to the  consummation  of any of the  transactions  contemplated by this
Agreement  or any  governmental  action  seeking  to  delay or  enjoin  any such
transactions shall be pending or threatened.

            (d)   Cancellation  of Kassel Indebtedness  to USHG.  As a result of
Kassel's agreement to substantially  reduce the compensation payable to him upon
the early  termination  of the Kassel  Employment  Agreement  and subject to all
applicable legal  requirements,  prior to the Closing,  USHG shall have canceled
and forgiven the loans to Kassel in the aggregate  principal amount of $487,000,
plus interest accrued through the Closing Date.

            (e)   Fairness  Opinion;  Valuation. USHG shall have received (i) an
opinion of Roth Capital Partners, LLC to the effect that, as of the date of such
opinion,  the  issuance  of the  Merger  Consideration  is fair to USHG  and its
stockholders  from a financial point of view, a copy of which opinion shall have
been  delivered  to  Ionatron,  and (ii) a  valuation  analysis  of Golden  West
Agri-Products,  Inc. by ISI Capital Capital Partners, LLC, a copy of which shall
have been delivered to Ionatron (the "Valuation Analysis").

            (f)   Ionatron Employee Stock Options, Warrants and Other Rights.The
stock option plans of Ionatron, if any, shall have been terminated.  Any warrant
and every other call,  subscription or right to acquire Ionatron Common Stock or
other securities of Ionatron shall have been cancelled and extinguished.

            (g)   Golden  West  Sale.  The  Golden  West  Sale  shall  have been
consummated.

            (h)   Consents and Approvals.  All  required  consents and approvals
hereunder  shall have been received and the  transactions  contemplated  by this
Agreement shall have been approved unanimously by the Ionatron Stockholders.

            (i)   Due  Diligence Review.  USHG  shall be satisfied  with its due
diligence  review of Ionatron as conducted in accordance  with the provisions of
Section 5.4.

            (j)   Financial  Statements.  Ionatron  shall have  delivered to the
USHG Parties its Audited Financial Statements for the fiscal year ended December
31, 2003.

            (k)   Schedule  14f-1  Filing.  USHG  shall have filed and mailed to
USHG  Stockholders the Schedule 14f-1 Filing with the SEC not less than ten days
prior to the Closing.

            (l)   Opinion of  Counsel.  Receipt of an opinion  dated the Closing
Date from Goodkind  Labaton  Rudoff & Sucharow LLP in a form  acceptable to USHG
and USHG's counsel.


                                       34


      6.2   Conditions to Obligations of Ionatron.  All  obligations of Ionatron
to  consummate  the  Merger  and the  other  transactions  contemplated  by this
Agreement, are subject, at Ionatron's option, to the fulfillment or waiver prior
to or at the Closing Date of each of the following conditions:

            (a)   Representations   and  Warranties.   All  representations  and
warranties  of the USHG Parties  contained in this  Agreement  shall be true and
complete in all  material  respects at and as of the Closing Date as though made
at and as of that time (except for  representations and warranties that speak as
of a specific  date or time which need only be true and complete as of such date
or time).

            (b)  Covenants and Conditions. The USHG Parties shall have performed
and  complied  in all  material  respects  with all  covenants,  agreements  and
conditions  required by this  Agreement to be  performed or complied  with by it
prior to or on the Closing Date.

            (c)   No Litigation.  No action,  suit or proceeding  against any of
the  USHG  Parties  relating  to the  consummation  of  any of the  transactions
contemplated  by this Agreement or any  governmental  action seeking to delay or
enjoin any such transactions shall be pending or threatened.

            (d)   Assumption  of  Obligations  by Kassel. Prior to the  Closing,
Kassel  shall have  assumed (i) his current  car lease  agreement,  and (ii) the
Lease for USHG's telephone system (the "Telephone Lease"). Kassel shall not have
any personal  liability  with respect to any  liabilities  or obligations of the
USHG Parties  with the  exception of the  liabilities  assumed  pursuant to this
Section 6.2(d).

            (e)   Satisfaction of Other  Liabilities. USHG shall have terminated
all of its  contractual  obligations and shall have obtained the release of USHG
and all of its Subsidiaries other than Golden West Agri-Products,  Inc. from all
of their respective liabilities, with the exception of the Permitted Liabilities
and Obligations.

            (f)   Consents and  Approvals.  Any  required consents and approvals
hereunder shall have been received,  and the  transactions  contemplated by this
Agreement shall have been approved unanimously by the Ionatron Stockholders.

            (g)   Due Diligence Review. Ionatron shall be satisfied with its due
diligence  review of USHG as  conducted in  accordance  with the  provisions  of
Section 5.4.

            (h)   Opinions  of Counsel. Receipt of an opinion  dated the Closing
Date  from  Richards  Layton  &  Finger,  which  shall  opine  that  USHG has no
obligations under the First Trust Agreement and no further obligations under the
Second Trust  Agreement and an opinion of Blank Rome LLP dated the Closing Date,
which shall opine (i) that USHG shall have no  obligations  under the Indentures
and Guarantees,  (ii) that the Merger shall qualify as a tax-free reorganization
under the Code, and (iii) such other corporate  opinions in a form acceptable to
Ionatron and Ionatron's counsel.

            (i)   Cancellations.  The  cancellations  of  Indebtedness  and  the
Golden West Sale referred to in Subsections 6.1(d) and 6.1(f).


                                       35


            (j)   Termination of Kassel and any other Employment  Agreement. The
Kassel Employment  Agreement and any other employment agreement to which USHG or
any of its Subsidiaries  other than Golden West  Agri-Products,  Inc. is a party
shall have been terminated.

            (k)   Resignation of Employees.  All current officers, directors and
employees of USHG and its  subsidiaries,  other than Golden West  Agri-Products,
Inc., shall resign and release USHG from all claims and liabilities except under
stock option or warrant agreements intended to continue as provided herein.

            (l)   Schedule  14f-1  Filing.  USHG  shall have filed and mailed to
USHG  Stockholders  the Schedule 14F-1 Filing with the SEC not less than 10 days
prior to the Closing.

            (m) Due  Diligence  Review.  Ionatron and the Ionatron  Stockholders
shall be satisfied with their due diligence review of the USHG Parties.

                                    SECTION 7
                               CLOSING DELIVERIES

      7.1   Deliveries by Ionatron.  On the Closing Date, Ionatron shall deliver
to the USHG Parties the following, in form and substance reasonably satisfactory
to the USHG Parties and their counsel:

            (a)   Certificate of Merger.  The  Certificate of Merger in the form
attached  hereto as Exhibit A dated the  Closing  Date and duly  executed by the
appropriate officers of Ionatron;

            (b)   Certificate.  A  certificate, dated  as of the  Closing  Date,
executed by an appropriate officer of Ionatron, certifying to USHG: (i) that the
representations  and warranties of Ionatron contained in this Agreement are true
and complete in all  material  respects as of the Closing Date as though made on
and as of that date (except for  representations and warranties that speak as of
a specific date or time, which need only be true and complete as of such date or
time) and (ii) that Ionatron has in all material respects performed and complied
with all of their  respective  obligations,  covenants  and  agreements  in this
Agreement to be performed and complied with on or prior to the Closing Date;

            (c)   Secretary's  Certificate.  A  certificate,  dated  as  of  the
Closing  Date,  executed  by  Ionatron's   Secretary  (i)  certifying  that  the
resolutions,  as  attached  to such  certificate,  were duly  adopted by each of
Ionatron's  Board of Directors and  Stockholders,  authorizing and approving the
execution of this Agreement and the consummation of the transaction contemplated
hereby  and that such  resolutions  remain in full  force and  effect,  and (ii)
providing,  as attachments thereto,  Ionatron's Certificate of Incorporation and
Bylaws, with all amendments;

            (d)   Good  Standing  Certificates.  Certificates  as  to  the  good
standing of Ionatron  issued by the Delaware  Secretary of State to be dated not
more than a reasonable number of days prior to the Closing Date;

            (e)   Stockholders'  Certificates.  Certificates representing all of
the   outstanding   shares  of  Ionatron  Common  Stock  held  by  the  Ionatron
Stockholders  as of the


                                       36


Closing Date,  accompanied by all documents  required to effect the surrender of
such  certificates  and evidence that any  applicable  stock transfer taxes have
been paid;

            (f)   Howard Note Amendment.  The amended Howard Note, duly executed
by Ionatron and Howard and;

            (g)   Other  Documents.  Such other documents  as are listed in this
Agreement or as are  reasonably  requested by the USHG Parties or their  counsel
for  complete   implementation   of  this  Agreement  and  consummation  of  the
transaction contemplated hereby.

      7.2   Deliveries by the USHG Parties. Prior to or on the Closing Date, the
USHG Parties  shall  deliver the  following,  in form and  substance  reasonably
satisfactory to Ionatron and its counsel:

            (a)   Delivery  of  Merger   Consideration.   Stock   certificate(s)
representing the shares of USHG Common Stock constituting  Merger  Consideration
in the amounts contemplated by this Agreement or an instruction letter from USHG
to its transfer agent directing it to issue such certificate(s);

            (b)   Certificate of Merger. The Certificate of Merger duly executed
by the appropriate officers of Merger Sub;

            (c)   Officer's  Certificate. A certificate, dated as of the Closing
Date,  executed on behalf of an officer of each of the USHG Parties,  certifying
(i)  that  the  representations  and  warranties  of  each of the  USHG  Parties
contained in this Agreement are true and complete in all material respects as of
the Closing  Date as though  made on and as of that date,  and (ii) that each of
the USHG Parties have in all material  respects  performed and complied with all
of its  obligations,  covenants and agreements in this Agreement to be performed
and complied with on or prior to the Closing Date;

            (d)   Secretary's  Certificate.  A  certificate,  dated  as  of  the
Closing Date,  executed by each of the USHG Parties'  Secretary:  (i) certifying
that the resolutions, as attached to such certificate, were duly adopted by each
of the USHG Parties' Board of Directors, authorizing and approving the execution
of this Agreement and the  consummation of the transaction  contemplated  hereby
and that such resolutions  remain in full force and effect;  and (ii) providing,
as  an  attachment   thereto,   each  of  the  USHG  Parties'   Certificates  of
Incorporation and Bylaws;

            (e)   Good  Standing  Certificates.  Certificates  as  to  the  good
standing of the USHG  Parties  issued by the  Delaware  Secretary of State to be
dated a date not more  than a  reasonable  number of days  prior to the  Closing
Date;

            (f)   Kassel  Severance.   The  Kassel  Cash   Severance  and  stock
certificates representing the Kassel Closing Shares;

            (g)   Kassel Investment  Representation Letter. A letter from Kassel
to USHG in a form acceptable to USHG pursuant to which Kassel shall make certain
investment


                                       37


representations  regarding the issuance to Kassel of the Kassel  Closing  Shares
similar to those set forth in Section 3.26 hereof;

            (h)   Evidence of Kassel Note and Employment Agreement Cancellation.
Evidence of the cancellation of the loans to Kassel and the Kassel and any other
Employment Agreements;

            (i)   Officer,    Director   and   Other   Employee    Resignations.
Resignations of all employees, directors and officers of USHG;

            (j)   Evidence of  Assignment  and   Assumption.   Evidence  of  the
assignment,  assumption,  release and  indemnification by Kassel with respect to
his current car lease and the Telephone Lease, duly executed by USHG and Kassel;
and

            (k)  Other  Documents. Such other documents listed in this Agreement
or as  are  reasonably  requested  by  Ionatron  or  its  counsel  for  complete
implementation   of  this  Agreement  and   consummation  of  the   transactions
contemplated hereby.

                                    SECTION 8
                                   TERMINATION

      8.1   Termination by Mutual  Consent.  This Agreement may be terminated at
any time prior to Closing by the mutual consent of the parties.

      8.2   Other  Termination.  This  Agreement  may be terminated by any party
hereto and the Merger abandoned if any other party hereto (the USHG Parties,  on
the one hand,  and Ionatron and the  Ionatron  Stockholders,  on the other hand)
shall have failed to satisfy any of its respective  conditions  precedent  under
Section 6 hereof (unless such failure  results  primarily  from the  terminating
party's  breach of any  representation,  warranty or covenant  contained in this
Agreement or under any other  agreement  contemplated  hereunder) or the Closing
shall not have occurred on or before March 31, 2004.

      8.3   Termination  by USHG.  The USHG Parties may terminate this Agreement
by giving written notice to Ionatron and the Ionatron  Stockholders  at any time
prior to the Closing in the event  Ionatron or the  Ionatron  Stockholders  have
breached any representation, warranty or covenant contained in this Agreement in
any material  respect,  the USHG Parties have notified Ionatron and the Ionatron
Stockholders  of the  breach and the breach  has  continued  without  cure for a
period of 10 days after the notice of breach.

      8.4   Termination  by Ionatron.  Ionatron may terminate  this Agreement by
giving  written notice to USHG at any time prior to the Closing in the event the
USHG Parties have breached any representation, warranty or covenant contained in
this Agreement in any material respect, Ionatron has notified USHG of the breach
and the  breach  has  continued  without  cure for a period of 10 days after the
notice of breach.

      8.5   Payment of Fees and Expenses  Upon Breach.  In addition to all other
rights and remedies that the USHG Parties, on the one hand, and Ionatron and the
Ionatron  Stockholders,  on the other hand,  may have,  (i) if this Agreement is
terminated  by the USHG  Parties  pursuant  to


                                       38


Section  8.3,  Ionatron  and the Ionatron  Stockholders  shall pay,  jointly and
severally,   the  USHG  Parties'   expenses  incurred  in  connection  with  the
authorization,   preparation,  execution  and  performance  of  this  Agreement,
including   all  fees  and   expenses  of  counsel,   accountants,   agents  and
representatives,  and (ii) if this  Agreement is  terminated by the Ionatron and
the Ionatron Stockholders pursuant to Section 8.4, USHG shall pay Ionatron's and
the  Ionatron   Stockholders'   expenses   incurred  in   connection   with  the
authorization,   preparation,  execution  and  performance  of  this  Agreement,
including   all  fees  and   expenses  of  counsel,   accountants,   agents  and
representatives.

                                   SECTION 9
                   SURVIVAL; INDEMNIFICATION; CERTAIN REMEDIES

      9.1   Survival.  Each of the parties hereto  hereby  agrees that:  (i) the
representations  and  warranties of Ionatron and the Ionatron  Stockholders  set
forth in Section 3.2 (Capitalization;  Ownership of Common Stock),  Section 3.12
(Tax Matters),  Section 3.14 (Personnel and Employee Benefits), and Section 3.17
(Compliance  with Legal  Requirements)  solely as the same  relates to  products
liability and except as set forth below, and the  representations and warranties
of the USHG Parties set forth in Section 4.2  (Capitalization),  Section  4.7(b)
(Assets and Liabilities), Section 4.8 (Tax Matters), Section 4.10 (Personnel and
Employee Benefits), and Section 4.13 (Compliance with Legal Requirements) solely
as same  relates  to product  liability  and  except as set forth  below,  shall
survive  Closing until the third  anniversary  of the Effective  Time,  (ii) the
representations  and  warranties of Ionatron and the Ionatron  Shareholders  set
forth in Section 3.3 (Authorization, Validity and Effect of Agreements), Section
3.16  (Environmental   Compliance)  and  Section  3.17  (Compliance  with  Legal
Requirements),   solely  as  they  relate  to   Environmental   Laws,   and  the
representations   and   warranties   of  the  USHG   Parties  in   Section   4.3
(Authorization,  Validity and Effect of Agreements), Section 4.12 (Environmental
Compliance) and Section 4.13  (Compliance  with Legal  Requirements),  solely as
they relate to Environmental Laws, shall survive the Closing  indefinitely,  and
(iii) all other  representations  and  warranties  of the parties  hereto  shall
survive the Closing until March 31, 2006.  All  covenants and  agreements of the
parties  contained in or made pursuant to this  Agreement or in any  certificate
furnished pursuant hereto shall survive the Closing.

      9.2 Indemnification.

            (a)   Indemnification by the Ionatron Stockholders.

                  The  Ionatron  Stockholders,  jointly  and  severally,  except
individually  where a  representation  is made  only by an  individual  Ionatron
Stockholder, hereby indemnify and agree to defend and hold harmless each of USHG
and Merger Sub from and against any and all losses,  obligations,  deficiencies,
liabilities, claims, damages, costs and expenses (including, without limitation,
the amount of any settlement  entered into pursuant  hereto,  and all reasonable
legal  and  other  expenses  incurred  in  connection  with  the  investigation,
prosecution or defense of any matter indemnified pursuant hereto) (collectively,
the "Losses") which either of them may sustain,  suffer or incur and which arise
out of, are caused by, relate to, or result or occur from or in  connection  any
misrepresentation of a material fact contained in any representation of Ionatron
and/or the Ionatron Stockholders contained in, or the breach by Ionatron, or the
Ionatron Stockholders of any warranty or covenant made by any one or all of them
in this  Agreement.


                                       39


The foregoing  indemnification  shall also apply to direct claims by USHG and/or
Merger Sub against the Ionatron Stockholders.

                  Indemnification by the Ionatron  Stockholders pursuant to this
Section  9.2(a) shall be paid,  in lieu of cash,  by an adjustment to the Merger
Consideration  whereby the Ionatron  Stockholders shall forfeit,  return, assign
and  transfer to USHG the  appropriate  number of shares of USHG Common Stock to
adjust  the  total  number  of  shares of USHG  Common  Stock  received  by them
hereunder  to the number of shares  which  would have been issued to them at the
Closing assuming (i) the value ascribed to USHG on a fully diluted basis for the
purposes of determining  the exchange ratio remained the same at the Closing and
(ii) the value ascribed to Ionatron for the purposes of determining the exchange
ratio was the same at the Closing less the indemnifiable amount.

            (b)  Indemnification  by USHG Parties.  Each of USHG and Merger Sub,
jointly and severally,  indemnifies  and agrees to defend and hold harmless each
of the Ionatron  Stockholders  and Ionatron (before the Effective Date) from and
against  any and all  Losses,  which it or he may  sustain,  suffer or incur and
which  arise out of,  are  caused  by,  relate to, or result or occur from or in
connection  with any  misrepresentation  of a  material  fact  contained  in any
representation  of USHG  and/or  Merger  Sub  contained  herein  or in the  Easy
Gardener  Sale  Agreement or the breach by USHG or Merger Sub of any warranty or
covenant made by either or both of them herein.  The  foregoing  indemnification
shall also  apply to direct  claims by  Ionatron  or the  Ionatron  Stockholders
against USHG and/or Merger Sub.

                  Indemnification  by the USHG Parties  pursuant to this Section
9.2(b)  shall  be  paid,  in  lieu  of  cash,  by an  adjustment  to the  Merger
Consideration  whereby a number of shares of USHG Common Stock will be issued to
the Ionatron  Stockholders to adjust the total number of shares received by them
to the  number  which  would  have been  issued at the  Closing,  based upon the
outstanding  number of shares as of the Closing Date on a fully  diluted  basis,
assuming  that the value  ascribed to Ionatron  for purpose of  determining  the
exchange  ratio at the Closing  remained the same and that the value ascribed to
USHG was the amount of cash held at Closing less the indemnifiable  amount, with
such adjustment not taking into effect any reduction to $9,500,000.

            (c)   Third  Party  Claims.  If a  claim  by a third  party  is made
against any party or parties  hereto and the party or parties  against whom said
claim  is made  intends  to seek  indemnification  with  respect  thereto  under
Sections  9.2(a) or 9.2(b),  the party or parties  seeking such  indemnification
shall promptly notify the  indemnifying  party or parties,  in writing,  of such
claim; provided,  however, that the failure to give such notice shall not affect
the rights of the indemnified  party or parties  hereunder  except to the extent
that such failure  materially and adversely  affects the  indemnifying  party or
parties due to the  inability  to timely  defend such action.  The  indemnifying
party or parties shall have ten (10) business days after said notice is given to
elect,  by  written  notice  given  to the  indemnified  party  or  parties,  to
undertake,  conduct and control,  through counsel of their own choosing (subject
to the  consent of the  indemnified  party or  parties,  such  consent not to be
unreasonably  withheld)  and at their  sole  risk and  expense,  the good  faith
settlement or defense of such claim, and the indemnified  party or parties shall
cooperate with the indemnifying parties in connection therewith;  provided:  (a)
all settlements  require the prior reasonable  consultation with the indemnified
party and the prior  written  consent


                                       40


of the indemnified party, which consent shall not be unreasonably  withheld, and
(b) the  indemnified  party or parties shall be entitled to  participate in such
settlement  or  defense  through  counsel  chosen  by the  indemnified  party or
parties,  provided  that the fees and expenses of such counsel shall be borne by
the indemnified party or parties.  So long as the indemnifying  party or parties
are contesting any such claim in good faith,  the  indemnified  party or parties
shall not pay or settle any such claim; provided,  however, that notwithstanding
the foregoing,  the indemnified  party or parties shall have the right to pay or
settle any such claim at any time,  provided that in such event they shall waive
any right of indemnification  therefor by the indemnifying party or parties.  If
the indemnifying party or parties do not make a timely election to undertake the
good  faith  defense  or  settlement  of  the  claim  as  aforesaid,  or if  the
indemnifying  parties fail to proceed with the good faith  defense or settlement
of the matter  after  making such  election,  then,  in either  such event,  the
indemnified  party or  parties  shall  have  the  right to  contest,  settle  or
compromise  (provided  that all  settlements  or  compromises  require the prior
reasonable  consultation  with the  indemnifying  party  and the  prior  written
consent of the  indemnifying  party,  which  consent  shall not be  unreasonably
withheld) the claim at their  exclusive  discretion,  at the risk and expense of
the indemnifying parties.

            (d) Assistance. Regardless of which party is controlling the defense
of any claim,  each party shall act in good faith and shall  provide  reasonable
documents and cooperation to the party handling the defense.

      9.3   Limitations on Indemnification.

            (a)   Notwithstanding  anything  contained in this  Agreement to the
contrary,  no party shall be obligated  to indemnify  any other party unless and
until Losses equal or exceed $100,000,  in which the indemnified  party shall be
entitled to  indemnification  against  the full amount of all damages  that have
been incurred or suffered in connection  with the  transactions  contemplated by
this Agreement (and not merely the portion of the damages  exceeding  $100,000);
provided,  however, that this Section 9.3 shall not apply with respect to claims
based upon any Losses  arising  out of or  relating  to any and all Taxes  which
should  have  properly  been  reflected  in the  individual  Tax  Returns of the
indemnifying party.

            (b)   Notwithstanding  anything  contained in this  Agreement to the
contrary, the liability for indemnity under this Section 9.3 shall be limited to
an amount equal to the value of the Merger Consideration on the Closing Date.

            (c)   With respect to any Indemnification Matter under Section 9 the
indemnifying  party shall have no liability  unless the party being  indemnified
gives notice of demand for indemnity with respect  thereto on or before the date
that  is  fifteen  (15)  days   following  the   expiration  of  the  applicable
representation survival period pursuant to Section 9.1.

      9.4   Indemnification Representatives.

            (a)   Appointment  of  Representatives.   The  USHG  Parties  hereby
irrevocably  appoint  Kassel and Fred  Heiden as their  respective  agents  (the
"Representatives")  for the sole purpose of (i) giving and receiving any and all
notices   under  this  Section  9  and  (ii)  making  any  and  all  claims  for
indemnification  and taking any and all actions  under this  Section 9


                                       41


which are  applicable to the USHG Parties  under this  Agreement or any document
contemplated  hereby to assert and resolve the  indemnification  obligations  of
Ionatron  and the Ionatron  Stockholders  or to defend and resolve any direct or
third party  claims for which  Ionatron or the  Ionatron  Stockholders  may seek
indemnification against the USHG Parties.

            (b)   Information  Provided to  Representatives.  In addition to all
USHG SEC Reports  filed with the SEC  subsequent  to the Closing  Date,  the New
Board shall cause to be delivered to each Representative in a timely manner, all
information  it believes in good faith is necessary for such  Representative  to
determine whether there is a breach of any representation,  warranty or covenant
by Ionatron or the Ionatron Shareholders under this Agreement which would be the
basis for any claim or potential claim available to the USHG Parties pursuant to
Section  9.2(a).  USHG shall bear all costs of  preparing  and  providing  these
reports.

            (c)   Indemnification of Representatives. The  USHG  Parties  agree,
jointly and severally, to hold the Representatives harmless and to indemnify the
Representatives  against  any loss,  liability,  expense  (including  reasonable
attorneys' fees and expenses),  claim, or demand arising out of or in connection
with the  performance of their  obligations in accordance with the provisions of
this  Agreement,  except  for gross  negligence  or  willful  misconduct  of the
Representatives  or any  action  taken  by  such  Representative  in bad  faith,
including  but not  limited  to all  expenses  incurred  by the  Representatives
arising in connection with the enforcement or defense of any  indemnification to
or from the USHG Parties pursuant to this Agreement.  The foregoing  indemnities
shall  survive  the  resignation  or  incapacity  of  a  Representative  or  the
termination  of such  Representative's  obligations  hereunder.  The  costs  and
expenses of enforcing this right of indemnification shall be paid by USHG.

            (d)   Specific Duties; No Liability. The Representatives' duties are
only such as are  specifically  provided  herein  and,  except  as  specifically
provided  herein,  the  Representatives  are not  charged  with  any  duties  or
responsibilities  in connection  with any other  agreement as a  consequence  of
their activity as Representatives under this Section 9), and the Representatives
shall  incur no  liability  whatsoever  to the USHG  Parties,  except  for gross
negligence, willful misconduct or any action taken by such Representative in bad
faith. The Representatives may consult with counsel and shall be fully protected
in any action taken in good faith in accordance with such advice.

            (e)   Resignation; New Representatives.  A Representative may resign
at any time by giving written notice  thereof to the other parties  hereto,  but
such resignation shall not become effective until a successor  Representative is
approved  by USHG.  In the  event  both  Representatives  resign,  die or become
incapacitated, the Board of Directors of USHG shall appoint a new Representative
who shall be  independent  and not an affiliate of USHG,  and who shall not be a
member of USHG's board of directors.

            (f)   Termination. The rights and obligations of the Representatives
shall terminate upon the expiration of the indemnification obligations set forth
in Section 9 of this Agreement and resolution to any matters pending thereunder.

      9.5   Dispute  Resolution.   In  the  event  of  any  dispute,   claim  or
controversy  concerning,  arising  out of or  relating  to this  Agreement,  its
effect,  the breach thereof,  or the


                                       42



transactions  contemplated  by hereby,  the  parties  shall  mutually  appoint a
Mediator and first attempt to resolve the dispute through non-binding mediation.
If the parties are unsuccessful in resolving the dispute through mediation,  the
same  shall  be  settled  by  arbitration  in  accordance  with  the  Commercial
Arbitration Rules of the American Arbitration Association (the "AAA Rules"). The
arbitration shall be before one neutral  arbitrator to be selected in accordance
with the AAA Rules and whose decision shall be rendered in writing.  The results
of the arbitration shall be final and binding upon the parties,  with costs paid
by the party who does not prevail in the arbitration,  and judgment on the award
may be entered in any court having jurisdiction thereof. In rendering the award,
the  arbitrator  shall  determine  the rights  and  obligations  of the  parties
according to the substantive  and procedural laws of the State of Delaware.  The
arbitration shall be held in the City of New York, or at such other place as may
be selected by mutual  agreement of the parties.  The  arbitrator  shall have no
authority  to award  punitive  damages or any other  damages not measured by the
prevailing  party's actual damages,  and may not, in any event, make any ruling,
finding  or award  that does not  conform  to the terms and  conditions  of this
Agreement. Neither a party hereto nor the arbitrator may disclose the existence,
content,  or results of any  arbitration  hereunder  without  the prior  written
consent  of  all  of  the  parties,  unless  required  to do so  by  order  of a
Governmental Body, or as required by any party's auditors in connection with the
preparation of audited  financial  statements,  or as required by the disclosure
requirements of any U.S. or foreign securities law, regulation or stock exchange
rule,  or if a petition to enforce  arbitration  is necessary to be filed with a
court of competent jurisdiction.

                                   SECTION 10
                                  MISCELLANEOUS

      10.1  Fees and Expenses. In the event the transaction contemplated by this
Agreement is  consummated  in accordance  with the terms  herein,  the Surviving
Corporation  shall bear all costs and expenses of all of the parties hereto.  In
the event such transaction is not consummated, USHG and Kassel, on the one hand,
and Ionatron and the Ionatron  Stockholders,  on the other hand, shall pay their
own  expenses  incurred  in  connection  with  the  authorization,  preparation,
execution and performance of this Agreement,  including all fees and expenses of
counsel,  accountants,  agents  and  representatives,  and each  party  shall be
responsible for all fees or commission payable to any finder,  broker,  advisor,
or similar Person retained by or on behalf of such party. The provisions of this
Section 10.1 shall survive the termination of this Agreement.

      10.2  Notices. All notices,  requests,  consents,  payments,  demands, and
other  communications  required or contemplated under this Agreement shall be in
writing and (a) personally delivered or sent via telecopy (receipt confirmed and
followed  promptly by delivery of the original),  or (b) sent by Federal Express
or other reputable  overnight delivery service (for next business day delivery),
shipping prepaid, as follows:

                  If to the USHG Parties or Representatives to:

                  U.S. Home & Garden Inc.
                  655 Montgomery Street
                  San Francisco, California 94111
                  Attn:  Robert Kassel


                                       43


                  David Harper
                  Telephone:  (415) 616-8111
                  Fax:  (415) 661-8110

                  With a copy to:

                  Robert J. Mittman, Esquire
                  Blank Rome LLP
                  The Chrysler Building
                  405 Lexington Avenue
                  New York, New York 10174
                  Telephone:  (212) 885-5000
                  Fax:  (212) 885-5001

                  If to Ionatron or the Ionatron Stockholders:

                  Ionatron Inc.
                  3590 East Columbia
                  Tucson, Arizona 85714
                  Attn:  Thomas Dearmin
                  Telephone:  (520) 628-7415
                  Fax:  (520) 622-3835

                  With copies to:

                  Robert Howard
                  303 East 57th Street, Apt. 38G
                  New York, New York 10022
                  Telephone:  (212) 980-5900
                  Fax: (212) 286-7098

                  Edmond Coller, Esq.
                  Goodkind Labaton Rudoff & Sucharow LLP
                  100 Park Avenue
                  New York, New York 10017-5563
                  Telephone:  (212) 907-0700
                  Fax:  (212) 818-0477

or to such other  Persons or addresses as any Person may request by notice given
as aforesaid. Notices shall be deemed given and received at the time of personal
delivery or completed telecopying,  or, if sent by Federal Express or such other
overnight delivery service one Business Day after such sending.

      10.3  Binding  Effect.  This Agreement  shall be binding upon and inure to
the  benefit of the parties  hereto and their  respective  successors,  assigns,
executors personal and legal representatives.

                                       44


      10.4  Further  Assurances.  The parties shall take any actions and execute
any other  documents  that may be necessary  or  desirable  (before or after the
Closing) to the implementation and consummation of this Agreement.

      10.5  GOVERNING  LAW.  THIS  AGREEMENT  SHALL BE GOVERNED,  CONSTRUED  AND
ENFORCED IN ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE (WITHOUT REGARD TO
THE CHOICE OF LAW PROVISIONS THEREOF).

      10.6  Entire Agreement. The Confidentiality  Agreement, this Agreement and
the Exhibits and the Schedules hereto,  each of which Exhibits and Schedules are
hereby  incorporated  herein by reference,  and all documents,  certificates and
other documents to be delivered by the parties  pursuant  hereto,  collectively,
represent  the entire  understanding  and  agreement  between the USHG  Parties,
Ionatron and the  Ionatron  Stockholders  with respect to the subject  matter of
this Agreement.  Except for the aforementioned  confidentiality  agreement, this
Agreement  supersedes all prior  negotiations  between the parties and cannot be
amended,  supplemented,  or  changed  except by an  agreement  in  writing  duly
executed  by  each  of the  parties  hereto.  There  are no  representations  or
warranties by any party except as expressly set forth herein.

      10.7  Waiver of Compliance; Consents. Except as otherwise provided in this
Agreement,  any  failure of any of the  parties to comply  with any  obligation,
representation, warranty, covenant, agreement, or condition herein may be waived
by the party  entitled  to the  benefits  thereof  only by a written  instrument
signed by the party  granting such waiver,  but such waiver or failure to insist
upon strict compliance with such obligation, representation, warranty, covenant,
agreement,  or  condition  shall not  operate as a waiver of, or  estoppel  with
respect to, any subsequent or other failure. Whenever this Agreement requires or
permits consent by or on behalf of any party hereto, such consent shall be given
in  writing  in a manner  consistent  with  the  requirements  for a  waiver  of
compliance as set forth in this Section 10.7.

      10.8  Headings.  The headings of the Sections and subsections contained in
this  Agreement  are  inserted  for  convenience  only and do not form a part or
affect the meaning, construction or scope thereof.

      10.9  Counterparts.   This   Agreement  may  be  signed  in  two  or  more
counterparts  with the same effect as if the signature on each  counterpart were
upon the same instrument.

      10.10 Cooperation. The parties hereto shall reasonably cooperate with each
other and their  respective  counsel  and  accountants  in  connection  with any
actions required to be taken as part of their respective  obligations under this
Agreement,  and in connection with any litigation after the  implementation  and
consummation of this Agreement,  and otherwise use their commercially reasonable
efforts to consummate the transaction  contemplated  hereby and to fulfill their
obligations under this Agreement,  including, without limitation, the obligation
of USHG after the Closing  Date to take all such action as may be  necessary  to
have  available  sufficient  authorized  capital  stock to satisfy its indemnity
obligations hereunder.

      10.11 Public  Announcements.  The parties  hereto shall  consult with each
other  before  issuing  any  press  releases  or  otherwise  making  any  public
statements  with  respect to this


                                       45


Agreement or the transactions  contemplated  herein and shall not issue any such
press  release  or make any such  public  statement  without  the prior  written
consent of the other party, which shall not be unreasonably withheld;  provided,
however, that a party may, without the prior written consent of the other party,
issue such press release or make such public statement as may be required by law
or any listing agreement with the securities  exchange to which the USHG Parties
are a party if it has used all  reasonable  efforts  to  consult  with the other
party and to  obtain  such  party's  consent  but has been  unable to do so in a
timely  manner.   This  provision  of  this  Section  10.11  shall  survive  the
termination of this Agreement.

         [The remainder of this page has been intentionally left blank.]


                                       46


      IN  WITNESS  WHEREOF,  this  Agreement  has  been  executed  by  the  duly
authorized  officers  of  Ionatron  and the USHG  Parties  as of the date  first
written above.

                                The USHG Parties:

                                        U.S. Home & Garden Inc.

                                        By:        /s/ Robert Kassel
                                            ------------------------------------
                                            Name:      Robert Kassel
                                            Title:     Chief Executive Officer


                                        Ionatron Acquisition Corp.

                                        By:        /s/ Robert Kassel
                                            ------------------------------------
                                            Name:      Robert Kassel
                                            Title:     President


                                        Representatives, for purposes of Section
                                        9.4 only:


                                            /s/ Robert Kassel
                                        ----------------------------------------
                                                Robert Kassel


                                            /s/ Fred Heiden
                                        ----------------------------------------
                                                Fred Heiden


                                            /s/ Robert Kassel
                                        ----------------------------------------
                                        Robert  Kassel,   individually  for  the
                                        purposes of Section 5.9, 6.2(d), 6.2(j),
                                        9.4 and 10.10 only


                                       47


                                        Ionatron:

                                        Ionatron Inc.

                                        By:        /s/ Thomas C. Dearmin
                                            ------------------------------------
                                            Name:      Thomas C. Dearmin
                                            Title:     Chief Executive Officer



                                        Ionatron Stockholders:

                                            /s/ Robert Howard
                                        ----------------------------------------
                                                Robert Howard


                                            /s/ Stephen W. McCahon
                                        ----------------------------------------
                                                Stephen W. McCahon


                                            /s/ Thomas C. Dearmin
                                        ----------------------------------------
                                                Thomas C. Dearmin


                                            /s/ Joseph C. Hayden
                                        ----------------------------------------
                                                Joseph C. Hayden


                                       48


                                                                         Annex 1

                               CERTAIN DEFINITIONS

      The  following  terms,  as used in this  Agreement,  have the meanings set
forth in this Annex 1 (terms  defined in the  singular  to have the  correlative
meaning in the plural and vice versa):

      "Affiliate"  means, with respect to any Person,  (a) any other Person that
directly  or  indirectly  through  one  or  more  intermediaries   controls,  is
controlled by, or is under common control with such Person, or (b) an officer or
director of such Person or of an Affiliate of such Person  within the meaning of
clause (a) of this  definition.  For purposes of clause (a) of this  definition,
(i) a Person  shall be deemed to control  another  Person if such Person (A) has
sufficient  power to  enable  such  Person to elect a  majority  of the board of
directors of such Person, or (B) owns a majority of the beneficial  interests in
income and capital of such Person;  and (ii) a Person shall be deemed to control
any partnership of which such Person is a general partner.

      "Closing"  means the  closing  of the  transactions  contemplated  by this
Agreement on the Closing Date.

      "Closing Date" means the date on which the Closing  occurs,  as determined
pursuant to Section 2.2.

      "Code" means the Internal Revenue Code of 1986, as amended.

      "Contaminant" shall mean and include any pollutant, contaminant, hazardous
material (as defined in any of the  Environmental  Laws),  toxic  substances (as
defined  in any of the  Environmental  Laws),  asbestos  or  asbestos-containing
material, urea formaldehyde, polychlorinated biphenyls, regulated substances and
wastes, radioactive materials, and petroleum or petroleum by-products, including
crude oil or any fraction thereof.

      "Contracts"   means  all   contracts,   consulting   agreements,   leases,
non-governmental licenses and other agreements (including leases for personal or
real  property  and  employment  agreements),  written  or oral  (including  any
amendments and other  modifications  thereto) that relate to or affect a party's
assets,  properties,  or its business or  operations,  the  performance of which
involves  annual  consideration  in excess of $50,000 and that either (a) are in
effect  on the date of this  Agreement,  or (b) are  entered  into by any  party
hereto between the date of this Agreement and the Closing Date.

      "Environmental  Laws" shall mean and  include,  but not be limited to, any
applicable federal,  state or local law, statute,  charter,  ordinance,  rule or
regulation  or  any  Governmental  Body  interpretation,   policy  or  guidance,
including, without limitation, applicable safety/environmental/health laws, such
as, but not limited to, the  Resource  Conservation  and  Recovery  Act of 1976,
Comprehensive  Environmental  Response  Compensation  and Liability Act, Federal
Emergency Planning and Community Right-to-Know Law, the Clean Air Act, the Clean
Water Act, and the Toxic  Substance  Control Act, as any of the  foregoing  have
been  amended,  and any  Governmental  Authorization  or Order  applicable to or
affecting  any  property




(real or  personal)  used by or  relating  to a party or issued  pursuant to any
Environmental  Laws which  pertains to,  governs,  or controls  the  generation,
storage,  remediation  or removal of  Contaminants  or otherwise  regulates  the
protection of health and the environment,  including, but not limited to, any of
the following  activities,  whether on site or off site if such could materially
affect the site: (i) the emission,  discharge,  release,  spilling or dumping of
any Contaminant into the air, surface water, ground water, soil or substrata; or
(ii) the use, generation,  processing,  sale,  recycling,  treatment,  handling,
storage,  disposal,  transportation,  labeling  or any other  management  of any
Contaminant.

      "ERISA"  means the Employee  Retirement  Income  Security Act of 1974,  as
amended.

      "Executive  Options"  shall  have the  meaning  ascribed  to such  term in
Section 5.9 hereof.

      "GAAP" means  generally  accepted  United  States  accounting  principles,
applied on a consistent basis.

      "Governmental Authorization" means any approval, consent, license, permit,
waiver,  or other  authorization  issued,  granted,  given,  or  otherwise  made
available by or under the authority of any Governmental  Body or pursuant to any
Legal Requirement.

      "Governmental Body" means any:

            (a) nation,  state, county, city, town, village,  district, or other
jurisdiction of any nature;

            (b) federal, state, local, municipal, foreign, or other government;

            (c)  governmental  or  quasi-governmental  authority  of any  nature
(including any governmental agency, branch, department,  official, or entity and
any court or other tribunal);

            (d) multi-national organization or body;

            (e) self-regulatory organization (including, with limitation, NASD);
or

            (f) body exercising,  or entitled to exercise,  any  administrative,
executive,  judicial,  legislative,  police,  regulatory, or taxing authority or
power of any nature.

      "Intangibles"  means all  copyrights,  trademarks,  trade  names,  service
marks,  service names,  domain names,  licenses,  patents,  and any applications
therefore,  permits,  proprietary  information,  technical information and data,
databases,  machinery and equipment, hardware, software and information systems,
warranties, and other intangible property rights and interests (and any goodwill
associated  with any of the  foregoing)  applied  for,  issued  to,  or owned by
Ionatron or under which  Ionatron is licensed or franchised and that are used in
its business and  operations,  together with any additions  thereto  between the
date of this Agreement and the Closing Date.

      "Ionatron  Stockholders"  shall have the meaning  ascribed to such term in
the preamble.

                                       2


      "Knowledge"  means (i) with  respect to the Ionatron  Stockholders,  their
actual  Knowledge  and (ii) with respect to the Ionatron and USHG  Parties,  the
actual  knowledge of such party's  officers and  directors,  provided  that such
persons  shall have made due and  diligent  inquiry of those  employees  of such
party who such  officers  and  directors  reasonably  believe  would have actual
knowledge of the matters represented.

      "Leased Real Property" means all real property and all buildings and other
improvements  thereon and  appurtenant  thereto leased or held by either USHG or
Ionatron, as the case may be.

      "Legal Requirement" means any federal, state, local,  municipal,  foreign,
international,  multinational,  self  regulatory  organization or court or other
administrative  order,  constitution,  law, ordinance,  principle of common law,
rule, regulation, statute, treaty, by-law, or the like.

      "Losses" means any loss, liability,  damage, cost, or expense,  including,
without limitation, reasonable attorneys' fees and expenses.

      "Material  Adverse  Effect"  shall mean a material  adverse  effect on the
business,  prospects,  operations,   properties,  financial  condition,  assets,
liabilities  or results of  operations  of the Person  referred  to,  taken as a
whole, or the ability of such Person to consummate the transactions contemplated
by this Agreement.

      "Order" means any award, decision,  injunction,  judgment,  decree, order,
ruling,  writ,  determination,  subpoena,  or verdict entered,  issued, made, or
rendered by any court,  administrative  agency, or other Governmental Body or by
any arbitrator.

      "Ordinary  Course of  Business" an action taken by a Person will be deemed
to have been taken in the "Ordinary Course of Business" only if:

            (a) such action is consistent with the past practices of such Person
and is taken in the ordinary course of the normal day-to-day  operations of such
Person;

            (b) such  action is not  required to be  authorized  by the board of
directors  of such  Person  (or by any  Person  or group of  Persons  exercising
similar authority); and

            (c) such  action is  similar  in nature  and  magnitude  to  actions
customarily  taken,  without any  authorization by the board of directors (or by
any Person or group of Persons  exercising similar  authority),  in the ordinary
course of the normal day-to-day operations of other Persons that are in the same
line of business as such Person.

      "Permitted  Encumbrances"  means (a) encumbrances of a landlord,  or other
statutory  lien not yet due and  payable,  or  landlord's  liens  arising in the
Ordinary  Course of  Business,  (b)  encumbrances  arising  in  connection  with
equipment or  maintenance  financing or leasing under the terms of the Contracts
set forth on the Schedules, which Contracts have been made available to the USHG
Parties,  (c)  encumbrances  for  Taxes  not yet  delinquent  or which are being
contested in good faith and by appropriate proceedings if adequate reserves with
respect  thereto are maintained on books of the  contesting  party in accordance
with generally  accepted  accounting  principles,  (d) encumbrances  that do not
materially  detract  from the value of any of


                                       3


material  assets of Ionatron  or  materially  interfere  with the use thereof as
currently used or (e) encumbrances arising in connection with the Howard Note or
any other loan from Howard to Ionatron.

      "Person" means an individual, corporation, association, partnership, joint
venture,   trust,   estate,   limited  liability   company,   limited  liability
partnership, organization or other entity or Governmental Body.

      "Real  Property  Interests"  means all interests in Leased Real  Property,
including  fee  estates,   leaseholds  and   subleaseholds,   purchase  options,
easements,  licenses, rights to access, and rights of way, and all buildings and
other improvements  thereon and appurtenant  thereto,  owned or held by Ionatron
that are used in the  business or  operations  of  Ionatron,  together  with any
additions,  substitutions and replacements  thereof and thereto between the date
of this Agreement and the Closing Date.

      "Related Person" means with respect to a particular individual:

            (a) each other member of such individual's Family;

            (b) any Person  that is directly or  indirectly  controlled  by such
individual or one or more members of such individual's Family;

            (c)  any  Person  in  which  such  individual  or  members  of  such
individual's Family hold (individually or in the aggregate) a Material Interest;
and

            (d) any Person with respect to which such  individual or one or more
members of such  individual's  Family  serves as a director,  officer,  partner,
executor, or trustee (or in a similar capacity); and

With respect to a specified Person other than an individual:

            (a) any Person that directly or indirectly controls,  is directly or
indirectly controlled by, or is directly or indirectly under common control with
such specified Person;

            (b) any  Person  that holds a Material  Interest  in such  specified
Person;

            (c)  each  Person  that  serves  as a  director,  officer,  partner,
executor, or trustee of such specified Person (or in a similar capacity);

            (d) any  Person in which  such  specified  Person  holds a  Material
Interest;

            (e) any Person with respect to which such specified Person serves as
a general partner or a trustee (or in a similar capacity); and

            (f) any Related Person of any individual  described in clause (b) or
(c).

For purposes of this definition,  (a) the "Family" of an individual includes (i)
the individual, (ii) the individual's spouse, (iii) any other natural person who
is  related  to the  individual  or the


                                       4


individual's  spouse within the second degree, and (iv) any other natural person
who resides with such  individual,  and (b) "Material  Interest" means direct or
indirect beneficial  ownership (as defined in Rule 13d-3 under the Exchange Act)
of voting  securities or other voting interests  representing at least 5% of the
outstanding  voting  power of a Person  or  equity  securities  or other  equity
interests  representing  at least 5% of the  outstanding  equity  securities  or
equity interests in a Person.

      "Reportable  Transaction"  shall mean any  transaction  listed in Treasury
Regulation Section 1.6011-4(b).

      "SEC" means the United States Securities and Exchange Commission.

      "Securities Act" means the Securities Act of 1933, as amended.

      "Subsidiary"  or  "Subsidiaries"  means,  with  respect to any party,  any
corporation, limited liability company, partnership, trust, limited partnership,
joint venture, or other business association or entity,  twenty percent (20%) or
more of the voting securities or economic  interests of which is or was directly
or  indirectly  owned or  controlled  by such party or by any one or more of its
Subsidiaries.

      "Tangible  Personal  Property"  means  all  machinery,  equipment,  tools,
vehicles, furniture, leasehold improvements, office equipment, plant, inventory,
spare parts and other tangible  personal property owned or held by Ionatron that
is used or useful in the conduct of the  business  or  operations  of  Ionatron,
together with any additions,  substitutions and replacements thereof and thereto
between the date of this Agreement and the Closing Date.

      "Tax" or "Taxes" means any federal, state, local, or foreign income, gross
receipts,  windfall  profits,  severance,   property,  production,  sales,  use,
license, excise, franchise, capital, transfer, employment, withholding, or other
tax or similar governmental assessment,  together with any interest,  additions,
or penalties with respect  thereto and any interest in respect of such additions
or penalties.

      "Tax   Proceeding"   means  any  audit,   examination,   claim,  or  other
administrative or judicial proceeding involving Taxes.

      "Tax  Return"  shall  mean  all  returns  and  reports,  amended  returns,
information returns, statements,  declarations,  estimates,  schedules, notices,
notifications,  forms, elections, certificates or other documents required to be
filed or submitted to any Governmental  Body with respect to the  determination,
assessment,  collection  or  payment  of  any  Tax  or in  connection  with  the
administration, implementation or enforcement of, or compliance with, any Tax.

      "Taxing  Authority"  shall  mean  any  Governmental  Body  exercising  tax
regulatory authority.

      "Trust   Preferred   Documents"  means  the  Amended  and  Restated  Trust
Agreement,  dated as of April 17 1998, among the USHG, as Depositor,  Wilmington
Trust Company  ("Wilmington  Trust"),  as Property Trustee and Delaware Trustee,
and the Administrative Trustees named therein (the "First Trust Agreement"); the
Second Amended and Restated Trust Agreement, dated as of October 29, 2003, among
the USHG,  as  Depositor,  Wilmington


                                       5


Trust, as Property Trustee and Delaware Trustee, and the Administrative Trustees
named therein (the "Second Trust Agreement"); the Junior Subordinated Indenture,
dated as of April 17, 1998,  between the USHG and Wilmington  Trust,  as trustee
(the "First Indenture"); the Amended and Restated Junior Subordinated Indenture,
dated as of October 29, 2003,  between the USHG and Wilmington Trust, as trustee
(together with the First Indenture, the "Indentures");  the Guarantee Agreement,
dated as of April  17,  1998,  between  the USHG and the  Wilmington  Trust,  as
trustee  (the  "First  Guarantee");  and  the  Amended  and  Restated  Guarantee
Agreement,  dated as of October 29,  2003,  between the USHG and the  Wilmington
Trust, as trustee (together with the First Guarantee, the "Guarantees").


                                       6


Pursuant to Item 601(b)(2) of Regulation S-K, the following is a list of omitted
schedules to the Amended and Restated Plan and Agreement of Merger.  USHG agrees
to provide complete copies of the foregoing schedules upon request.

Ionatron Schedules

Schedule 2.1(f)         USHG Common Stock to be Issued at Closing
Schedule 3.2            Capitalization, Ownership of Common Stock
Schedule 3.4            Books and Records
Schedule 3.6            Governmental Authorizations
Schedule 3.7            Real Property
Schedule 3.8            Tangible Personal Property
Schedule 3.9(a)         Contracts in Excess of $50,000
Schedule 3.9(b)         Matters Relating to Government Contracts and Government
                        Bids
Schedule 3.10           Material Intangibles
Schedule 3.11           Financial Statements
Schedule 3.12           Tax Matters
Schedule 3.13           Insurance
Schedule 3.14           Personnel and Employee Benefits
Schedule 3.14(g)        Labor Relations
Schedule 3.15(a)        Material Legal Actions and Orders
Schedule 3.16           Environmental Compliance
Schedule 3.17           Compliance with Legal Requirements
Schedule 3.18           Conduct of Business in Ordinary Course
Schedule 3.20           Accounts Receivable
Schedule 3.21           Customers and Suppliers Accounting for More than $50,000
                        to Date
Schedule 3.22           Relationships with Related Persons
Schedule 3.23           Brokers or Finders
Schedule 3.25           Due Diligence


USHG Schedules

Schedule 4.2            Capitalization; Subsidiaries
Schedule 4.4            Books and Records
Schedule 4.7            USHG Assets and Liabilities
Schedule 4.8            Tax Matters
Schedule 4.9            List of Insurance Carriers
Schedule 4.10           Employees; Employee Benefits; Labor Relations
Schedule 4.11           Legal Actions and Orders
Schedule 4.12           Environmental Compliance
Schedule 4.13           Compliance with Legal Requirements
Schedule 4.15           Brokers or Finders


                                       7


                                                                       Exhibit A

                              CERTIFICATE OF MERGER

                                       OF

                           IONATRON ACQUISITION CORP.

                                      INTO

                                 IONATRON, INC.

            Pursuant to Section 251(c) of the General Corporation Law

            Ionatron  Acquisition  Corp.,  a Delaware  corporation,  desiring to
merge with Ionatron, Inc., a Delaware corporation, pursuant to the provisions of
Section  251(c) of the General  Corporation  Law of the State of Delaware,  does
hereby certify as follows:

      FIRST:   The  names  and  states  of  incorporation  of  each  constituent
corporation are:

                   Name                                State of Incorporation
        --------------------------                     ----------------------
        Ionatron Acquisition Corp.                            Delaware
        Ionatron, Inc.                                        Delaware

      SECOND:An  Agreement  and  Plan of  Merger  has  been  approved,  adopted,
certified,   executed  and  acknowledged  by  each  constituent  corporation  in
accordance with Section 251(c) of the General Corporation Law.

      THIRD: The name of the surviving corporation is Ionatron, Inc.

      FOURTH:The  Certificate of  Incorporation  of Ionatron,  Inc. shall be the
Certificate of Incorporation of the surviving corporation.

      FIFTH:  An executed copy of the Agreement and Plan of Merger is on file at
the  principal  place of business of the  surviving  corporation,  c/o Ionatron,
Inc., 3590 East Columbia,  Tucson,  Arizona 85714,  Attn: Thomas Dearmin,  and a
copy of the  Agreement  and Plan of Merger will be  furnished  by the  surviving
corporation,  on request and without cost, to any stockholder of any constituent
corporation.




            IN WITNESS WHEREOF, Ionatron, Inc. has caused this Certificate to be
executed this 18th day of March, 2004.

                                        IONATRON, INC.


                                        By: ________________________________
                                            Name: Thomas C. Dearmin
                                            Title:   Chief Executive Officer