On September 11 the passenger jet as a weapon came crashing into the consciousness of the citizens of the country which had made international air travel viable. Muslim terrorists had viewed planes in terms of the passengers and hijacked planes to take people hostage. But at the beginning of the millennium it was no longer the people that mattered, only the use of the plane as a makeshift missile aimed at the institutions and infrastructure of the free world.
This change of tactics was a game changer because it meant the potential casualties of airplane hijackings were no longer limited to the passengers in the air who were now flying around in ICBM's with much less explosive payload, but enough to take down skyscrapers and kill thousands of people. Every passenger was no longer just a risk to other passengers, but a risk to everyone in the Empire State Building, the Sears Tower or any other clumping of people in target areas that could be hit.
