WTC 7

Why did WTC 7 fall down hours later, and without taking a direct hit?

Larry Silverstein, the owner of the WTC complex, admitted on a September 2002 PBS documentary, 'America Rebuilds' that he and the NYFD decided to 'pull' WTC 7 on the day of the attack. [Link]

At the time of its destruction, Building 7 housed documents relating to numerous SEC investigations. The files for approximately three to four thousand cases, millions of documents, were destroyed, according to the Los Angeles Times. Among the destroyed documents were ones that may have demonstrated the relationship between Citigroup and the WorldCom bankruptcy.

The CIA also lost an undercover operations center, the significance of which I can only guess at.

Of additional interest:
http://www.wtc7.net/
http://www.whatreallyhappened.com/wtc7.html
http://en.wikipedia.org/wiki/7_World_Trade_Center