Quote:
Originally Posted by MattyC
My only issue with 911 is how the buildings fell. I don't know who it was or why and Im not going to speculate that it was the US or AQ or whatever. But if a building is going to collapse from an impact like that its not going to do so in perfect demolition style.
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There's nothing special about the way buildings fall in controlled demolitions. They fall that way because of basic physics. If you destabilize a building's support structure, the weight of the building will collapse in on itself.
Go to YouTube a search for videos of controlled demolitions (I think you can find the Calgary General Hospital among others), most buildings actually require very few explosives to cause the catastrophic failure that will make the building fall. Once the supports are destabilized, gravity and inertia do most of the work.
The WTC towers actually stood for quite a long time after the planes hit, but after the fires burned for so long, the steel finally weakened to the point of failure, and they fell...just like a building in a controlled demolition (although, there was definitely a lot of damage to surrounding buildings - so, they definitely weren't "clean" collapses), not because they were controlled demolitions but because controlled demolitions take advantage of a building's natural tendencies to collapse in a certain way, which is the same way the WTC towers fell.