Good point CarolC.

Here's a good place for you to start, Bill BobadaFirthaTroupe. The best overall analyst I've come across on the subject of 9/11. David Ray Griffin:

It is, in any case, already possible to know, beyond a reasonable doubt, one very important thing: the destruction of the World Trade Center was an inside job, orchestrated by domestic terrorists. Foreign terrorists could not have gotten access to the buildings to plant the explosives. They probably would not have had the courtesy to make sure that the buildings collapsed straight down, rather than falling over onto surrounding buildings. And they could not have orchestrated a cover-up, from the quick disposal of the steel to the FEMA Report to The 9/11 Commission Report to the NIST Report. All of these things could have been orchestrated only by forces within our own government.

The evidence for this conclusion has thus far been largely ignored by the mainstream press, perhaps under the guise of obeying President Bush's advice not to tolerate "outrageous conspiracy theories." We have seen, however, that it is the Bush administration's conspiracy theory that is the outrageous one, because it is violently contradicted by numerous facts, including some basic laws of physics....

(A good analysis of the Building 7 inconsistencies is at this site):

http://911review.com/articles/griffin/nyc1.html

Basically, the government never proved its case for how and why the attacks occurred, and they never demonstrated how the buildings fell. They generated phony numbers, warped the laws of physics and completely ignored little details like the fall of a 47-story skyscraper. And they used the phrase 'theory' over and over in their reports, while warning the public to beware of 'outrageous conspiracy theories.' The arrogance of that is incredible. The 'bipartisan' govt then swept the whole thing aside, which leads to a whole other problem of single-party fascist rule.