This clip about the fall of World Trade Center Building 7 explains why it is one of the most convincing pieces of evidence that the attacks of 9/11 were not the acts of terrorists. Nothing traceable to 19 hijackers could have produced this collapse. The NIST report, released for comment in August '08 actually returns to their original explanation that they previously described as having a "low probability of occurrance", fire, as the explanation. They attribute it to expansion of a long beam exposed to heat. How that caused a collapse indistinguishable from a controlled demolition they do not explain.
In this celebrated clip, BBC reporter Jane Standley describes how the Solomon Bros. Building, WTC Bldg. 7 has collapsed with the building showing over her left shoulder. The clip shows the loss of picture that occurred about 5 minutes before the actual collapse of the building.
Barry Jennings, a NYC official went to WTC 7 that morning looking for Rudy Giuiliani, in company with NYC Corporation Counsel Michael Hess. He was trapped in the building for several hours by explosions. This is his description of the event. Mr. Jennings died in August of this year at the age of 53 two days before the NIST report on the collaspe of Buildig 7 was released to the public.