911 - Trump, speaking on the day of the attacks:

Trump, speaking on the day of the attacks: "I said how could a plane, even a plane, even a 767 or a 747, or whatever it might've been... how could it possibly go through the steel? I happen to think that they had not only a plane, but they had bombs that exploded almost simultaneously, cuz I just can't imagine anything being able to go through that wall."

Trump knew.