^^ dude, American Airlines stopped all their planes on the ground, as did United Airlines (in the 9/11 Commission Report).... you cannot say that it was a different mentality pre-9/11... there are procedures and they were not followed...
think about how stupid this sounds: America, the only superpower, didn't send fighter jets to intercept KNOWN (in the commission report) 4 hijacked flights AND they knew all of them were EXTERMELY off course... i could see that happening in Madagascar... but nope, not the good 'ol USA.