How did building 7 fall?

Answer 1

NIST has released video and still photo analysis of Building 7 prior to its collapse that appears to indicate a greater degree of structural damage from falling debris than originally assumed by FEMA. Specifically, the NIST's interim report on 7 WTC displays photographs of the southwest facade of the building which clearly has suffered significant damage. The NIST interim report on 7 WTC details a 10-story gash that existed on the south facade, extending a third of the way across the face of the building and approximately a quarter of the way into the interior, but does not provide any photographs of the damage to the south facade.[1] A unique aspect of the design of 7 WTC was that each outer structural column was responsible for supporting 2,000 square feet (186 square meters) of floor space, suggesting that the simultaneous removal of a number of columns would lead to a severely compromised structure. Consistent with this theory, news footage shows visible cracking and bowing of the building's east wall immediately prior to the collapse, which started from the penthouse floors.

Conspiracy theories are unfounded.

Answer 2

WTC? Or another site?

Answer 3

Lets pull it.............

By internal US means.