More info Here:
http://www.wtc7.net
There has never been an adequate explanation of why Building 7 collapsed,
A 2002 government report concludes: The specifics of the fires in WTC 7 and how they caused the building to collapse remain unknown at this time. Although the total diesel fuel on the premises contained massive potential energy, the best hypothesis has only a low probability of occurrence. [FEMA study, 5/1/02]
Some reports indicate that the building may have been deliberately destroyed. Shortly after the collapse, CBS News anchor Dan Rather comments that the collapse is reminiscent of ... when a building was deliberately destroyed by well-placed dynamite to knock it down. [CBS News, 9/11/01]
In a PBS documentary broadcast in 2002, the World Trade Center's leaseholder Larry Silverstein talks about a phone call from the Fire Department commander he had on 9/11. Silverstein recalls saying to the commander about the building: You know, we've had such terrible loss of life, maybe the smartest thing to do is pull it. And they made that decision to pull and then we watched the building collapse. [PBS, 9/10/02]