I don't know that there was or wasn't a conspiracy. I tend to doubt the size of it all because betewwn the Pentagon, FBI and White House, they could make the Keystone Cops look efficient and professional. (In other words, they could fu#k-up a one car funeral.) However, there is one helluva lot of smoke and mirrors to do with 9/11, which even the author of the articke Bruce linked to says:

"Although, I have to admit, even after many hours of research over several years, the only conclusion I'm willing to make these days about 9/11 is that nobody really knows what happened. And the people who should be able to find out what happened, have done everything in their power to limit the research as much as possible."