00540nam 2200169z- 450 9910693786803321(CKB)4970000000042588(EXLCZ)99497000000004258820240129c2002uuuu -u- -engNational Airspace System : FAA's approach to its new communications system appears prudent, but challenges remainWashington, D.CNational Airspace SystemDOCUMENT9910693786803321National Airspace System3424084UNINA