01770nam 2200409 a 450 991069335210332120050802090929.0(CKB)5470000002362014(OCoLC)61189666(EXLCZ)99547000000236201420050802d2005 ua 0engurmn|---|||||txtrdacontentcrdamediacrrdacarrierNational airspace system[electronic resource] progress and ongoing challenges for the Air Traffic Organization : testimony before the Subcommittee on Aviation, Committee on Transportation and Infrastructure, House of Representatives /statement of Gerald L. Dillingham[Washington, D.C.] :U.S. Government Accountability Office,[2005]Testimony ;GAO-05-485 TTitle from title screen (viewed on May 6, 2005)."For release ... April 14, 2005."Paper version available from: U.S. Government Accountability Office, 441 G St., NW, Rm. LM, Washington, D.C. 20548.Includes bibliographical references.National airspace system National Airspace System (U.S.)Air traffic controlUnited StatesEvaluationNational Airspace System (U.S.)Air traffic controlEvaluation.Dillingham Gerald Lee1947-1381675United States.Congress.House.Committee on Transportation and Infrastructure.Subcommittee on Aviation.United States.Government Accountability Office.GPOGPOBOOK9910693352103321National airspace system3427694UNINA