And the fuel... jeez, everyone quotes the fuel. Check it. When the building fell, all of its windows were still intact. If the 42,000 gal capacity fuel tank (although only reported to be at 12k gallons when it went down) HAD explosded, we would have seen a few windows go. And it sure as heck wouldn't have been symmetrical- And, while it might have taken out part of the lower section of the building, the top half, completely unharmed 1 second before the collapse, surely wouldn't have been pulverized. Ever see those car bombs on the news? The shell always remains and the blast is incredible. What we had on WTC7 was a series of powerful, very small yet very numerous blasts directly on those 2 support columns and on each floor, simultaneously. And, since the penthouse up top "kinks" and collapses FIRST, we can rule out those fuel tanks and point out the classic sign of a controlled demo, the kinking roof.