the obvious reason that it is patently ridiculous to suggest that the US
govt was involved is that too many people would have been involved and
keeping the secret would be impossible. If you were the president would you
trust your life to a technician who would be laying the charges around the
towers? We are talking first degree murder and you can bet Bush, Rummy,
Condy etc would not be risking their lives - sticking their necks out. You
would have to be stupid to believe in a conspiracy theory no matter how the
bldg imploded etc.
The same goes for the stupid theory that NASA staged the moon landing. Far
too many people involved to keep a secret.