In Reply to: I live about 5 miles from the Pentagon and posted by Bill H. on September 12, 2001 at 11:27:48:
not to say it wasn't, i know they can reach those speeds in a dive.
but after seeing the video of the planes that hit the TRADE CENTER many times,(i work in TV) they were definately travelling slower than the speed of sound. more like 300+mph. it would be too difficult with that large a plane to hit the target at such high speed.
so i would guess that the plane that hit the pentagon was flown carefully at the target.
i believe you can check the flight pattern on a web site.. maybe new york times, it may have the air speed. i know you can watch the flight path of both planes that hit the WTC.
if it was a sonic boom, you certainly witnessed something unique.