01541oam 2200385 a 450 991069334920332120050803092341.0(CKB)5470000002362044(OCoLC)61117010(EXLCZ)99547000000236204420050721d2005 ua 0engurmn|---|||||txtrdacontentcrdamediacrrdacarrierNational Airspace System[electronic resource] FAA has made progress but continues to face challenges in acquiring major air traffic control systems : report to congressional requesters /United States Government Accountability Office[Washington, D.C.] :U.S. Government Accountability Office,[2005]Title from title screen (viewed on July 19, 2005)."June 2005."Paper version available from: U.S. Government Accountability Office, 441 G St., NW, Rm. LM, Washington, D.C. 20548."GAO-05-331".Includes bibliographical references.National Airspace System National Airspace System (U.S.)FinanceForecastingAir traffic controlUnited StatesFinanceForecastingNational Airspace System (U.S.)FinanceForecasting.Air traffic controlFinanceForecasting.GWLGWLGPOBOOK9910693349203321National Airspace System3424084UNINA