I'm not so sure myself that the 9/11 attacks were unprovoked. And if they were unprovoked, the U.S had warning that there was going to possibly be a planned terrorist attack on U.S soil and did nothing about it.

I usually think conspiracy theorists have too much time on their hands, but they do raise some valid points. And Michael Moore, as insanely biased as he is, also raises some valid points concerning 9/11. The attack in my opinion was not an inside job, but it didn't have to be for the U.S to use it as a springboard to get themselves into the Middle-East. Knowing about it and not doing anything about it may not be as far from planning it as people might think.