I don't get it... why do they need to have flown the plane 2 feet off of the ground? They learned how to land a plane if flight school, wouldn't crashing the plane into the pentagon be just like landing the plane, but touching down 2 feet in front of the bulding, or in the building? Why did they have to fly two feet off of the ground for a while?
The video of the object that hit the pentagon was showing that the object was flying horizontal when it hit.
Also the damage to the building indicated that whatever it was that hit the pentagon hit it on a horizontal trajectory.
If it was a plane that hit it exactly as it was told to us, then there would have been a lot more wreckage present.