01769nam 2200409 a 450 991069799620332120081231074841.0(CKB)5470000002393026(OCoLC)294953599(EXLCZ)99547000000239302620081231d2007 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierAviation security[electronic resource] DHS has made progress in securing the commercial aviation system, but key challenges remain : testimony before the Subcommittee on Transportation Security and Infrastructure Protection, House Committee on Homeland Security /statement of Cathleen A. Berrick[Washington, D.C.] :U.S. Govt. Accountability Office,[2007]20 pages digital, PDF fileTestimony ;GAO-08-139 TTitle from title screen (viewed on Nov. 15, 2008)."For release ... October 16, 2007."Includes bibliographical references.Aviation security AirportsSecurity measuresUnited StatesEvaluationAeronautics, CommercialSecurity measuresUnited StatesAirportsSecurity measuresEvaluation.Aeronautics, CommercialSecurity measuresBerrick Cathleen A1381679United States.Congress.House.Committee on Homeland Security.Subcommittee on Transportation Security and Infrastructure Protection.United States.Government Accountability Office.GPOGPOBOOK9910697996203321Aviation security3424509UNINA