Of course it could succeed. It did. Its easy to see how.
Security at airports used to be lax. After the hijackings in the 70s, everyone learned not to resist. Nobody would expect hijackers to use box-cutters. Everyone expects hijackers to use guns so that's what they look for. Passengers who were hijacked would expect to have been taken to Cuba, not to be slammed into buildings. Therefore, nobody resists. And it is difficult to believe so people aren't as vigilant as they would be if they were expecting it
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getting a sharp object on a plane is still no big task and you ignore the ample prior warnings and offer no examination of the timeline and the ability to intercept or the many conflicts of critical testimony of key people involved at NORAD and the FAA
the stalling of air defense could no longer be contained
I don't think it was, but it is the only plausible conspiracy theory. And if it was, why would a fighter blow it out of the sky and let the other three planes hit buildings? Why would it not be allowed to hit its next target, whatever it may be
same answer...these are theories..only a honest independent investigation with full subpoena power, testimony under oath and subject to cross examination will give definitive answers...the
absolute certainty is the official reports are cover-ups,,and almost completely false