United 93 debris is rubbish (in the, laughable sense of the word), Plane that hit the pentagon debris is rubbish. They covered up the evidence with dirt (actual dirt), why would the FBI have the need to confiscate the nearby hotel tapes that show the attack? Why would NORAD/USAF take about 80 minutes in a critical emergency response? Why is the ground mark on the United 93 crash site actually older than 9/11? How can a building really collapse in such a way after taking less damage than even those bombed buildings on the news?
Okay. Let me quote Bin Laden here:

"Mr. Fisk, I hope we can turn America into a shadow of its former self"

Does that answer your questions?