[CORed]

Another excellent link. I find the seismographic evidence especially convincing (not that I needed much convincing).

Edit:
I find it interesting that the demolition people make the same point I made in an earlier "9/11 conspiracy" thread. A controlled demolition knocks out the bottom of the building. The 9/11 collapses started on the impact floors and progressed from there downward. I am by no means an expert on explosive demolition, but I have seen countless videos of explosive demolition and one in person, and the collapse os the WTC towers looked nothing like any explosive demolition I have ever seen.