WTF? Dude, you really stop saying $hit like that. Seriously. America was well aware of Al-Quaeda, as well as many other world-spread terrorist organisations, and has done a lot (but obviously not enough) to deal with that threat. Yes, as it showed later on, the US didn't take Al-Quaeda quite as seriously as it should've. As for the supporting thing - the US never supported any terrorist organisation. They did support the Afghan Mujahideen, while those were fighting the Soviet Union, around the mid-1980s. The Islamic combatants were then fighting an enemy mutual to the US, and supporting them was the right thing to do, in the view of the time. Retrospectively, it was wrong. But the older, the wiser, eh?one must also remember that the ira was some great big joke to america a few years ago and they supported it