> N665UA.
9/11 UAL FLIGHT
N624aa was used for flt 77 most of end of Aug and start of Sept
N624aa was in Logan Sept 10th (Flight 181, 11:00)
Airliners.net has a photo at logan of N644AA but its not listed at all on BTS either August or September at logan or Dulles.
Does not appear at Reagan Sept 2001.