01814nam 2200421 a 450 991069623730332120071121120351.0(CKB)5470000002376450(OCoLC)181740823(EXLCZ)99547000000237645020071121d2007 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierTransportation security[electronic resource] efforts to strengthen aviation and surface transportation security are under way, but challenges remain : testimony before the Committee on Commerce, Science, and Transportation, U.S. Senate /statement of Cathleen A. Berrick[Washington, D.C.] :U.S. Govt. Accountability Office,[2007]28 p digital, PDF fileTestimony ;GAO-08-140 TTitle from title screen (viewed on Nov. 14, 2007)."For release ... October 16, 2007."Paper version available from: U.S. Govt. Accountability Office, 441 G St., NW, Rm. LM, Washington, D.C. 20548.Includes bibliographical references.Transportation security TransportationSecurity measuresUnited StatesAeronautics, CommercialSecurity measuresUnited StatesTransportationSecurity measuresAeronautics, CommercialSecurity measuresBerrick Cathleen A1381679United States.Congress.Senate.Committee on Commerce, Science, and Transportation.United States.Government Accountability Office.GPOGPOBOOK9910696237303321Transportation security3440616UNINA