Reply #19: the operating speed has to do with controlling the plane

[spooked911]

and the target wasn't that big, especially considering the hit was close to center for both. Remember the pilot had never even really flown a jet before.

As far as your point-- I'm not claiming the plane would have fallen apart at that speed. But I think there is debate about whether the plane could really reach that speed near sea level. There is also no doubt that an inexperienced pilot would have trouble controlling the plane at that speed.