The reason 7 World Trade Center collapsed straight down, he said, was most likely the large amounts of diesel fuel stored in the building?s lower levels. The fuel was meant to power emergency generators.
??The conspiracy theorists fail to recognize that there was structural damage in Building 7 caused by flying debris after the first two towers collapsed,'? Mr. Corbett said. ??This led to fires that burned for several hours which eventually collapsed Building 7, too.'?
Ms. O?Donnell is not convinced by Mr. Corbett, or her co-host Elisabeth Hasselbeck, who echoed the explanation. ?I do believe that it?s the first time in history that fire has ever melted steel,? Ms. O?Donnell said during a show available on YouTube.
?Ms. O?Donnell fundamentally misstates the case with her use of the word ?melted.??
As the fire raged for hours, it was probably fed by the emergency command center?s fuel tanks in the basement, the head of the investigation told the magazine. Under those conditions, it is possible to reach temperatures that ?ultimately weakened ? not melted ? the steel structures,? it said, before tossing out some factoids:
Steel melts at about 2,750 degrees Fahrenheit?but it loses strength at temperatures as low as 400 F. When temperatures break 1000 degrees F, steel loses nearly 50 percent of its strength. It is unknown what temperatures were reached inside WTC7, but fires in the building raged for seven hours before the collapse.
[Update, 3:16 pm ET: Aside from the physics of it, Ms. O?Donnell is the most prominent person lately to endorse the demolition theory, which ?has managed to endure what would seem to be enormous obstacles to its practicality,? Jim Dwyer wrote in a Times article on efforts to counter conspiracy theories about 9/11:
Controlled demolition is done from the bottom of buildings, not the top, to take advantage of gravity, and there is little dispute that the collapse of the two towers began high in the towers, in the areas where the airplanes struck.
Moreover, a demolition project would have required the tower walls to be opened on dozens of floors, followed by the insertion of thousands of pounds of explosives, fuses and ignition mechanisms, all sneaked past the security stations, inside hundreds of feet of walls on all four faces of both buildings. Then the walls presumably would have been closed up.
All this would have had to take place without attracting the notice of any of the thousands of tenants and workers in either building; no witness has ever reported such activity. Then on the morning of Sept. 11, the demolition explosives would have had to withstand the impacts of the airplanes, since the collapse did not begin for 57 minutes in one tower, and 102 minutes in the other. ]
..............................................................
read it and weep tin foil heads.
