Document:

Exhibit
        10.4

       

      July __,
        2005

       

      Fortress
        America Acquisition Corporation

      3
        Bethesda Metro Center

      Suite
        700

      Bethesda,
        MD 20814

      

      Sunrise
        Securities Corp.

      641
        Lexington Avenue

      25th
        Floor

      New
        York,
        New York 10022

       

      Re: 
        Initial Public Offering

       

      Gentlemen:

       

      The
        undersigned stockholder and director of Fortress America Acquisition Corporation
        (“Company”), in consideration of Sunrise Securities Corp. (“Sunrise”) entering
        into a letter of intent (“Letter of Intent”) to underwrite an initial public
        offering of the securities of the Company (“IPO”) and embarking on the IPO
        process, hereby agrees as follows (certain capitalized terms used herein
        are
        defined in paragraph 11 hereof):

       

      1.            
        If the
        Company solicits approval of its stockholders of a Business Combination,
        the
        undersigned will vote all Insider Shares owned by him in accordance with
        the
        majority of the votes cast by the holders of the IPO Shares. 

       

      2.            In
        the
        event that the Company fails to consummate a Business Combination within
        12
        months from the effective date (“Effective Date”) of the registration statement
        relating to the IPO (or 18 months under the circumstances described
        in the
        prospectus relating to the IPO), the undersigned will take all reasonable
        actions within his power to cause the Trust Fund (as defined in the Letter
        of
        Intent) to be liquidated and distributed to the holders of the IPO
        Shares. The undersigned hereby waives any and all right, title, interest
        or
        claim of any kind in or to any distribution of the Trust Fund as a result
        of
        such distribution with respect to his Insider Shares (“Claim”) and hereby waives
        any Claim the undersigned may have in the future as a result of, or arising
        out
        of, any contracts or agreements with the Company and will not seek recourse
        against the Trust Fund for any reason whatsoever. 

       

      3.            In
        order
        to minimize potential conflicts of interest which may arise from multiple
        affiliations, the undersigned agrees to present to the Company for its
        consideration, prior to presentation to any other person or entity, any suitable
        opportunity to acquire an operating business, until the earlier of the
        consummation by the Company of a Business Combination, the distribution of
        the
        Trust Fund or until such time as the undersigned ceases to be a director
        of the
        Company, subject to any pre-existing fiduciary or contractual obligations
        the
        undersigned might have.

       

      4.            
        The
        undersigned acknowledges and agrees that the Company will not consummate
        any
        Business Combination which involves a company which is affiliated with any
        of
        the Insiders unless the Company obtains an opinion from an independent
        investment banking firm reasonably acceptable to Sunrise that the business
        combination is fair to the Company’s stockholders from a financial
        perspective.

       

      5.            
        Neither
        the undersigned, any member of the family of the undersigned, nor any Affiliate
        of the undersigned will be entitled to receive and will not accept any
        compensation for services rendered to the Company prior to the consummation
        of
        the Business Combination; provided that the undersigned shall be entitled
        to
        reimbursement from the Company for his out-of-pocket expenses incurred in
        connection with seeking and consummating a Business Combination.

       

      6.            
        Neither
        the undersigned, any member of the family of the undersigned, nor any Affiliate
        of the undersigned will be entitled to receive, or accept, a finder’s fee or any
        other compensation in the event the undersigned, any member of the family
        of the
        undersigned or any Affiliate of the undersigned originates a Business
        Combination. 

       

      
        
           

        

        
           

          
            

          

        

        
           

        

      

      7.            
        The
        undersigned will escrow his Insider Shares for the three year period commencing
        on the Effective Date subject to the terms of a Stock Escrow Agreement which
        the
        Company will enter into with the undersigned and an escrow agent acceptable
        to
        the Company.

       

      8.            The
        undersigned agrees to be a member of the Board of Directors of the Company
        until
        the earlier of the consummation by the Company of a Business Combination
        or the
        distribution of the Trust Fund.  The undersigned’s biographical information
        furnished to the Company and Sunrise is true and accurate in all respects,
        does
        not omit any material information with respect to the undersigned’s background
        and contains all of the information required to be disclosed pursuant to
        Section 401 of Regulation S-K, promulgated under the Securities Act
        of
        1933.  The undersigned’s questionnaires furnished to the Company and
        Sunrise are true and accurate in all respects.  The undersigned represents
        and warrants that:

       

      (a)          he
        is not
        subject to or a respondent in any legal action for, any injunction,
        cease-and-desist order or order or stipulation to desist or refrain from
        any act
        or practice relating to the offering of securities in any
        jurisdiction;

       

      (b)          he
        has
        never been convicted of or pleaded guilty to any crime (i) involving any
        fraud
        or (ii) relating to any financial transaction or handling of funds of another
        person, or (iii) pertaining to any dealings in any securities and he is not
        currently a defendant in any such criminal proceeding; and

       

      (c)          he
        has
        never been suspended or expelled from membership in any securities or
        commodities exchange or association or had a securities or commodities license
        or registration denied, suspended or revoked.

       

      9.            The
        undersigned has full right and power, without violating any agreement by
        which
        he is bound, to enter into this letter agreement and to serve as a member
        of the
        Board of Directors of the Company.

       

      10.          The
        undersigned authorizes any employer, financial institution, or consumer credit
        reporting agency to release to Sunrise and its legal representatives or agents
        (including any investigative search firm retained by Sunrise) any information
        they may have about the undersigned’s background and finances
        (“Information”).  Neither Sunrise nor its agents shall be violating the
        undersigned’s right of privacy in any manner in requesting and obtaining the
        Information and the undersigned hereby releases them from liability for any
        damage whatsoever in that connection.

       

      11.          
        As used
        herein, (i) a “Business Combination” shall mean an acquisition by merger,
        capital stock exchange, asset or stock acquisition, reorganization or otherwise,
        of an operating business in the homeland security industry selected by the
        Company; (ii) “Insiders” shall mean all officers, directors and stockholders of
        the Company immediately prior to the IPO; (iii) “Insider Shares” shall mean all
        of the shares of Common Stock of the Company owned by an Insider prior to
        the
        IPO; and (iv) “IPO Shares” shall mean the shares of Common Stock issued in the
        Company’s IPO.

        

      
        	 	
                Donald
                  L. Nickles

              	 
	 	
                Print
                  Name of Insider

              
	
                 

              	
                 

              
	
                 

              	
                 

              
	 	
                
                   

                

              	 
	 	
                SignatureExhibit
      10.5

      AGREEMENT

      

      THIS
        AGREEMENT is made as of this ___ day of July, 2005, by and among FORTRESS
        AMERICA ACQUISITION CORPORATION, a Delaware corporation (the “Company”), SUNRISE
        SECURITIES CORP., a Delaware corporation (“Sunrise”), and PALADIN
        HOMELAND SECURITY FUND, L.P.,
        a
        Delaware limited partnership, PALADIN HOMELAND SECURITY FUND (NY CITY), L.P.,
        a
        Delaware limited partnership, PALADIN HOMELAND SECURITY FUND (CA), L.P.,
        a
        Delaware limited partnership, and PALADIN HOMELAND SECURITY FUND (CAYMAN
        ISLANDS), L.P., a limited partnership formed under the laws of the Cayman
        Islands (individually, “Stockholder,” and collectively,
“Stockholders”).

      

      A.
        Sunrise entered into a Letter of Intent (the “Letter of Intent”) with the
        Company to underwrite an initial public offering of the securities of the
        Company (“IPO”) and embark on the IPO process.

      

      B.
        As a
        condition and in consideration for Sunrise underwriting the IPO, Sunrise,
        the
        Company and the Stockholders must agree to certain terms and conditions as
        more
        fully described in this Agreement.

      

      C.
        Capitalized terms used in this Agreement, unless defined elsewhere, shall
        have
        the meaning ascribed to them in Section 11 hereof.

      

      NOW,
        THEREFORE, for good and valuation consideration, the parties hereto hereby
        agree
        as follows:

      

      1. If
        the
        Company solicits approval of its stockholders of a Business Combination,
        Stockholders will vote all Insider Shares owned by them in accordance with
        the
        majority of the votes cast by the holders of the IPO Shares.

       

      2. In
        the
        event that the Company fails to consummate a Business Combination within
        12
        months from the effective date (“Effective Date”) of the registration statement
        relating to the IPO (or 18 months under the circumstances described
        in the
        prospectus relating to the IPO), Stockholders will take all reasonable actions
        within their power to cause the Trust Fund (as defined in the Letter of Intent)
        to be liquidated and distributed to the holders of the IPO Shares. Each
        Stockholder hereby waives any and all right, title, interest or claim of
        any
        kind in or to any distribution of the Trust Fund as a result of such
        distribution with respect to such Insider Shares (“Claim”) and hereby waives any
        Claim Stockholder may have in the future as a result of, or arising out of,
        any
        contracts or agreements with the Company and will not seek recourse against
        the
        Trust Fund for any reason whatsoever (including in connection with enforcement
        of the Company’s indemnification obligations under paragraph 9
        hereof).

      

      3. Stockholders
        acknowledge and agree that the Company will not consummate any Business
        Combination which involves a company which is affiliated with any of the
        Insiders unless the Company obtains an opinion from an independent investment
        banking firm reasonably acceptable to Sunrise that the Business Combination
        is
        fair to the Company’s stockholders from a financial perspective.

      

      
        
           

        

        
           

          
            

          

        

        
           

        

      

      4. Stockholders
        will not be entitled to receive, and will not accept, any compensation for
        services rendered to the Company prior to the consummation of the Business
        Combination; provided that Stockholders shall be entitled to reimbursement
        from
        the Company for their out-of-pocket expenses incurred on behalf of the
        Company.

      

      5. Stockholders
        will not be entitled to receive, or accept, a finder’s fee or any other
        compensation in the event Stockholders, any member of a family of a Stockholder
        or any Affiliate of Stockholders originates a Business Combination.

       

      6. Stockholders
        will escrow their Insider Shares for the three-year period commencing on
        the
        Effective Date, subject to the terms of a stock escrow agreement substantially
        in the form attached hereto as Exhibit A which the Company will enter into
        with
        Stockholders and an escrow agent acceptable to the Company.

      

      7. The
        Company and Stockholders agree to enter into a registration rights agreement
        substantially in the form attached hereto as Exhibit B.

       

      8. Stockholders
        hereby represent and warrant that the information furnished in writing to
        the
        Company and to Sunrise marked expressly for inclusion in the Registration
        Statement on Form S-1 (the “Registration Statement”) is true and accurate in all
        respects, does not omit any material information with respect to any Stockholder
        that would otherwise be required to be disclosed under the Securities Act
        of
        1933, as amended, or any rule or regulation promulgated thereunder.

      

      9. The
        Company agrees to indemnify and hold harmless Stockholders, and each of their
        respective officers, employees, affiliates, directors, and partners (each,
        an
“Indemnified Party”), from and against any expenses, losses, judgments, claims,
        damages or liabilities arising out of or based upon any untrue statement
        (or
        allegedly untrue statement) of a material fact contained in the Registration
        Statement, preliminary prospectus or final prospectus (or any amendment or
        supplement thereto), or arising out of or based upon any omission (or alleged
        omission) to state a material fact required to be stated therein or necessary
        to
        make the statements therein not misleading, or any violation by the Company
        of
        the Securities Act of 1933, as amended, or any rule or regulation promulgated
        thereunder applicable to the Company and relating to action or inaction required
        of the Company in connection with the registration; and the Company shall
        promptly reimburse the Indemnified Party for any legal and any other expenses
        reasonably incurred by such Indemnified Party in connection with investigating
        and defending any such expense, loss, judgment, claim, damage or liability;
        provided however, that the Company shall not be liable in any such case to
        the
        extent that any such expense, loss, claim, damage or liability arises out
        of or
        is based upon any untrue statement or allegedly untrue statement or omission
        or
        alleged omission made in the Registration Statement, preliminary prospectus,
        or
        final prospectus (or any amendment or supplement thereto) in reliance upon
        and
        in conformity with information furnished to the Company, in writing, by any
        Stockholder expressly for use therein. Each Stockholder hereby waives any
        and
        all right, title, interest or claim of any kind in or to the Trust Fund or
        any
        distribution from the Trust Fund in respect of any claim or rights Stockholder
        may have in the future against the Company as a result of, or arising out
        of,
        the Company’s indemnification obligations in this paragraph 8 and will not seek
        recourse against the Trust Fund for any reason whatsoever.

      

      
        
           

        

        
          2

          
            

          

        

        
           

        

      

      10. As
        used
        herein, (i) a “Business Combination” shall mean an acquisition by merger,
        capital stock exchange, asset or stock acquisition, reorganization or otherwise,
        of an operating business in the homeland security industry selected by the
        Company; (ii) “Insiders” shall mean all officers, directors and stockholders of
        the Company immediately prior to the IPO; (iii) “Insider Shares” shall mean all
        of the shares of Common Stock of the Company owned by an Insider prior to
        the
        IPO; and (iv) “IPO Shares” shall mean the shares of Common Stock issued in the
        Company’s IPO.

      

      IN
        WITNESS WHEREOF, the parties have executed this Agreement as of the date
        first
        above written.

      

      

      

      FORTRESS
        AMERICA ACQUISITION CORPORATION

      

      By:  _    

          
Harvey
        L.
        Weiss, President and Chief Executive
        Officer

      

      

      SUNRISE
        SECURITIES CORP.

      

      By:       

      Its:
        President        

      

      

      PALADIN
        HOMELAND SECURITY FUND, L.P.

      

      
        	 	
                By:

              	
                PALADIN
                  HOMELAND SECURITY HOLDINGS, LLC, its General
                  Partner

              

      

      

      By:      

      Michael
        R. Steed, Authorized Signatory

      

      

      PALADIN
        HOMELAND SECURITY FUND (NY CITY), L.P.

      

      
        	 	
                By:

              	
                PALADIN
                  HOMELAND SECURITY HOLDINGS, LLC, its General
                  Partner

              

      

      

      By:       

      Michael
        R. Steed, Authorized Signatory

      

      
        
           

        

        
          3

          
            

          

        

        
           

        

      

      PALADIN
        HOMELAND SECURITY FUND (CA), L.P.

      

      
        	 	
                By:

              	
                PALADIN
                  HOMELAND SECURITY HOLDINGS, LLC, its General
                  Partner

              

      

      

      By:      

      Michael
        R. Steed, Authorized Signatory

      

      

      PALADIN
        HOMELAND SECURITY FUND (CAYMAN ISLANDS), L.P.

      

      
        	 	
                By:

              	
                PALADIN
                  HOMELAND SECURITY HOLDINGS (CAYMAN ISLANDS), LTD., its General
                  Partner

              

      

      

      By:      

      Michael
        R. Steed, Authorized Signatory

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