Occam's beard cutting tool, get it, use it, Jocko. Never build ad hoc Castles in the sky that require complex foundations made of non-existent clouds, when you can build your castles solidly on the ground with facts that better explain the events.
Let's see. Hundreds of eye witness who see an American Airline plane flying low and then strike the Pentagon who are willing to be named VS. Unnamed anonymous source claims to have seen super-secret missile/aircraft "carefully designed" nearby on the ground, apparently painted in the livery of American Airlines, which would have had to have been built by hundreds of skilled aircraft engineers/mechanics/technicians in some super secret factory and he lives to escape to tell his tale? Who to believe?
An aluminun air craft is also much lighter than most people think. The outside skin is only 2mm thick and crumples easily. Despite the lightness the crash site was a 96 foot wide hole that went through the building even after the plane belly touched the ground before it hit.
Very impressive amount of damage.