NIST 'unable to provide a full explanation of the total collapse'

NIST has admitted what was clear from a careful reading of their reports that the simulations they conducted went as far as collapse initiation. They do not explain the total collapse of the World Trade Center towers. The following are quotes from a NIST letter dated September 27, 2007.

B. NIST Computer Simulations: "NIST has used an extensive database of photographic and video evidence to validate the models used to analyze the behavior of the towers up to the point of initiation of collapse."

E. The WTC Steel Temperature: "While NIST did not find evidence that any of the recovered core columns experienced temperatures in excess of 250C, it is not possible to extrapolate from such a small sample size to state that none of the core columns on the fire affected floors reached temperatures in excess of 250C."

F. The Goal of the WTC Report and Its Overall Analysis: "NIST has stated that it did not analyze the collapse of the towers. NIST carried its analysis to the point where the buildings reached global instability. . . . we were unable to provide a full explanation of the total collapse."

A draft report, long delayed, of the 47-story World Trade Center building 7 has yet to be released.