It would seem very difficult to crash an airliner into such a low building. Also there is no footage of the impact only the aftermath.
On the other hand it seems equally unlikely that a plane crash could be faked and you are able to set up that aftermath scene without any of the public seeing a set being set up.
If it was a plane, it was a very small business jet full of explosives. Not sure what American pilot would accept orders to fire a missile at the Pentagon though so that fact always bothers me.
i 1000 percent agree