As I posted on another thread, CBS NEWS is now reporting that the phone call from a passenger to his mother included a description of other passengers fighting with the terrorists in an attempt to take back control of the aircraft. The aircraft, CBS reported, was flying at 500 ft. at the time and nosed over into the ground. They are presuming that this loss of control of the aircraft occurred as a direct result of this struggle for control.
Now the following is JUST SPECULATION, but I believe that the aircraft must have been headed for Washington. Reasoning being this: two aircraft for New York, two for Washington, the two most powerful cities on the east coast. If so, who knows what the final target was. On one hand, someone might say that the target was still the Pentagon--one crash to take out one half of the structure, and another to take out the other half, with the fire fueled by avgas taking care of the rest. This would make sense, given that the two planes in NYC crashed into a single complex.
On the other hand, the target could have been anything in Washington from the White House to the Capitol to the Monument. We simply do not know, and unless something incriminating was caught on the CVR, we probably never will.
Again, this is JUST SPECULATION. Please do not take it as fact or start rumors. Thank you.