Undaunted by such appeals to common sense, Sept. 11 conspiracists point to gaps in what we know or widely repeated falsehoods as proof positive that the attacks were not what they seemed. To hear them tell it, United Flight 93 was not brought down by the heroism of everyday Americans but was shot down by U.S. fighter pilots. Similarly, the conspiracists insist that airplanes couldn't have taken down the World Trade Center towers or the nearby 7 WTC building, but that controlled demolitions accounted for their collapse. Then there's the theory that the Pentagon was hit not with an airplane but by a missile.
Never mind that the whole country witnessed the horrific sight of planes flying into the World Trade Center, the immediate aftermath of the Pentagon attack and eventually heard the heartrending cell phone calls and cockpit recordings from Flight 93. Or that many studies on the twin towers have concluded that jet fuel combined with incredible levels of heat were to blame for their collapse. Or that 7 WTC sustained much more fire damage in the attack than initially reported. Or that there's no possible way to predict exactly how such a chaotic scenario will play out.
The true believers continue to insist that our minds must have deceived us.