01436oam 2200433 a 450 991070197480332120120710092238.0(CKB)5470000002422368(OCoLC)775940418(EXLCZ)99547000000242236820120211d2012 ua 0engurmn||||a||||txtrdacontentcrdamediacrrdacarrierHomeland defense[electronic resource] continued actions needed to improve management of air sovereignty alert operations : report to congressional requesters[Washington, D.C.] :U.S. Govt. Accountability Office,[2012]1 online resource (ii, 41 pages) color illustrationsTitle from title screen (viewed on Feb. 11, 2012)."January 2012.""GAO-12-311."Includes bibliographical references.Homeland defense Air defensesUnited StatesCivil defenseUnited StatesNational securityUnited StatesTerrorismUnited StatesPreventionAir defensesCivil defenseNational securityTerrorismPrevention.DIDDIDGPOBOOK9910701974803321Homeland defense3424085UNINA