The History channel is promoting an upcoming special entitled,
The Plot to Kill Nixon. There is also an upcoming film called
The Assassination of Richard Nixon, starring Sean Penn. It's a true story based on Samuel Bicke's attempt to hijack an airliner in 1974 and crash it into the White House.
My point is this - following 9/11, our government repeatedly told us that they never conceived of the idea of someone using an airplane as a weapon (nevermind the nut who tried to crash a single engine plane into Clinton's White House). But that's obviously not the case - would the CIA or FBI or Secret Service really forget this incident? Certainly our government didn't need 9/11 to prove that it could be done.
I'm not promoting any conspiracy or suggesting anything really, other than that 9/11 was the result of negligence and a failure of our leaders to properly safeguard the nation - and that our government was well aware of the possibility of using airplanes as weapons.