Anteon Acquisition Review Extended by Request for Additional Information

The request extends the waiting period imposed by theHart-Scott-Rodino Antitrust Improvements Act of 1976 during which theDOJ conducts its review of a proposed transaction. While Anteon doesnot know when the DOJ will complete its review, Anteon continues toanticipate that the transaction will close by the end of the secondquarter of 2006, as previously announced.

About Anteon

Anteon, headquartered in Fairfax, Virginia, is a leadinginformation technology company serving the U.S. Federal government andinternational customers. Anteon designs, integrates, maintains, andupgrades state-of-the-art systems for national defense, intelligence,homeland security, and other high priority government missions. Anteonprovides numerous government clients with the systems integration,strategy and program management, systems engineering, operationsservices, and simulation and training skills necessary to manage thedevelopment and operations of their mission critical systems. TheCompany was founded in 1976 and currently employs over 9,500 employeesin more than 100 offices worldwide. Anteon consistently ranks amongthe top information technology integrators based on independentsurveys, and has been named to the Forbes List of the 400 Best BigCompanies in 2006, earning distinction on the Forbes Platinum List.Anteon is listed on the Standards & Poor's MidCap 400 Index. For moreinformation, visit www.anteon.com.

CAUTIONARY LANGUAGE CONCERNING FORWARD-LOOKING STATEMENTS

Statements herein regarding the proposed transaction betweenAnteon International Corporation and General Dynamics Corporation, theexpected timetable for completing the transaction, future financialand operating results, benefits and synergies of the transaction,future opportunities for the combined company and any other statementsabout Anteon International Corporation management's futureexpectations constitute forward looking statements within the meaningof the Private Securities Litigation Reform Act of 1995. Suchstatements are based upon the current beliefs and expectations ofAnteon International Corporation's management and are subject tosignificant risks and uncertainties. There are a number of importantfactors that could cause actual results or events to differ materiallyfrom those indicated by such forward looking statements, including:the ability to obtain governmental approvals of the transaction on theproposed terms and schedule and the failure of Anteon InternationalCorporation stockholders to approve the transaction. Additionalfactors that may affect future results are contained in AnteonInternational Corporation's filings with the Securities and ExchangeCommission ("SEC"), including its Annual Report on Form 10-K for theyear ended December 31, 2004, which are available at the SEC's Website (http://www.sec.gov). The information set forth herein speaksonly as of the date hereof, and Anteon International Corporationdisclaims any intention or obligation to update any forward lookingstatements as a result of developments occurring after the datehereof.

IMPORTANT ADDITIONAL INFORMATION WILL BE FILED WITH THE SEC

In connection with the proposed transaction, Anteon InternationalCorporation has filed a definitive Proxy Statement with the SEC andhas mailed such final Proxy Statement to its stockholders. INVESTORSAND SECURITY HOLDERS OF ANTEON INTERNATIONAL CORPORATION ARE URGED TOREAD THE PROXY STATEMENT AND ANY OTHER RELEVANT DOCUMENTS FILED WITHTHE SEC WHEN THEY ARE AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANTINFORMATION ABOUT ANTEON INTERNATIONAL CORPORATION, THE PROPOSEDTRANSACTION AND RELATED MATTERS. Investors and security holders ofAnteon International Corporation may obtain copies of the ProxyStatement, as well as other filings with the SEC that may beincorporated by reference into such documents, containing informationabout Anteon International Corporation, without charge, at the SEC'sInternet site (http://www.sec.gov). These documents may also beobtained for free from Anteon International Corporation by directing arequest to Anteon International Corporation, Investor Relations, 3211Jermantown Road, Fairfax, Virginia 22030-2801 or at AnteonInternational Corporation's Investor Relations page on its corporatewebsite at www.anteon.com.