What is the evidence Osama directed 9/11, or that the U.S. Government did not?

Seems there is more evidence to implicate the government. Such as the collapse of building 7 when the plane designated to hit it crashed in penn. And the fact evidence incriminating the cia in massive defense dept. thefts (1.3 trillion $) was contained in 5 floors of that building. As in the section of pentagon that was hit which was investigating said theft..