Updated: Rebuttals of the 9/11 "truthers" conspiracy theories

UPDATE OF THIS UPDATE: I just found another great site which also debunks, in particular, the famous "nano-thermite" theory of the 9/11 truthers: www.debunking911.com

A list of major lies in Loose Change

National Institute of Standards and Technology (NIST) Federal Building and Fire Safety Investigation of the World Trade Center Disaster

POPULAR MECHANICS: Debunking the 9/11 Myths: Special Report