This is a very good movie, based mainly on film shot by an independent movie maker, on 9/11, from the Frank Sinatra Pier about 2 miles from the WTC documents that explosions are heard before the collapses of all 3 buildings. Also, shows that WTC 7 fell at completely free-fall speed for at least the first 300 feet, and mysterious flashes from a helicopter just before the first tower fell. 

Source: Google Video