Alot of witneses have been written off, it’s all very confusing..
"Although later that day the aircraft that struck the Pentagon was said to be Flight 77,
which was a Boeing 757, this equation was evidently not immediately obvious. Danielle
O’Brien, one of the air traffic controllers at Dulles who reported seeing the aircraft at
9:25, said: "The speed, the maneuverability, the way that he turned, we all thought in the
radar room, all of us experienced air traffic controllers, that that was a military plane."
Another witness, seeing the plane from a 14th floor apartment in Pentagon City, said that
it “seemed to be able to hold eight or twelve persons” and "made a shrill noise like a
fighter plane." Lon Rains, editor at Space News, said: "I was convinced it was a
missile. It came in so fast it sounded nothing like an airplane." Still another witness,
who saw it from his automobile, was reported as saying that it "was like a cruise missile
with wings." The official account, however, would be that it was a much bigger
aircraft, a Boeing 757—indeed, Flight 77 itself."