Friday, August 22, 2008
Remember, Remember, 11th September
There are some images of the impossible destruction on 9/11 that I can't forget. Here's an aerial view of the rubble taken a couple days after the event.
The smoke is still rising from the piles of both towers and building 7, in spite of firemen spraying millions of gallons of water on the heaps of debris. You can see severe damage to the building at the lower left, and more holes torn into the roof of the building at the lower right. The buildings across the street however (Verizon on the upper left, and the Post Office on the upper right) appear relatively unscathed -- except for the one in between. That's the remains of WTC7, the first and only steel-framed building over 10 stories to be totally destroyed by office fires and a "new phenomenon" NIST calls "fire-induced thermal expansion."
Here's a color-coded image identifying the remains:
Then and Now
Early theories about the demise of WTC7, put forward by Popular Mechanics in a March, 2005 cover story, and supported with statements from Dr. Shyam Sunder, supposed that serious damage caused by Tower 1's explosive collapse turned building 7 into a wreck just waiting to fall down. We have yet to see any photos revealing such extensive damage but Popular Mechanics said they saw them in a private showing. We were supposed to take their word for it. I always wondered how the Verizon building and the Post Office escaped similar damage from Tower 1's energetic debris. And then, I wondered why those two buildings showed no damage from the implosion of WTC7 either.
As we're told now, by the same Dr. Shyam Sunder, all that was needed to totally destroy this 47-storey steel skyscraper and make it look just like a controlled demolition, was an office fire on a few floors. NIST claims that those fires weakened the connection between a beam and a critical northeast core column. This initiated a domino effect resulting in first one, then several floors giving way. That left the critical core column unsupported over the span of 9 floors, so it buckled causing more floors and beams to break loose above, and then like dominos, the other 80 columns went along for the ride in rapid succession wherein the whole building fell down.
Dr. Sunder reassures us that they've got it right this time. "The public should really recognize the science is really behind what we have said," he said, adding: "The obvious stares you in the face."