WTC7 seems to be a classic controlled demolition. WTC 1 &2 destruction appears to have been enhanced by thermate (a variation of thermite) in addition.
Pentagon was not struck by a passenger aircraft. It was a drone or missle.
I hate to interrupt the Workshop, but the Houston Chronicle is reporting that Ken Lay has died from a heart attack in Colorado.
UPDATE: Peter Henning explains how Lay's death extinguishes the criminal case against him under appeal, preserves his estate against the forfeiture action, and may create a collateral estoppel argument that plaintiffs in the civil case cannot use Lay's conviction as any evidence in the civil case against him. Wow. Larry Ribstein also weighs in.