A self destruct device for a skyscraper? ROFL! That is too much.
Anybody with the skill to have setup something like that would have known it was useless to try.
Seriously, what that guy doesn't understand is that contrary to popular misconception buildings don't fall over, they fall down. It's not a coincidence or a conspiracy that the collapse of the towers looked very much like a controlled demolition. It's simple physics and engineering. That is the only way they can fall.
The highly skilled demolitions experts you see blowing up stadiums and office buildings have things down to a level of sophistication that they can take them down and not damage a building on the other side of a narrow street. Didn't the WTC collapse take out like 5 or 6 other buildings and damage another dozen? That was pretty much a worst case scenario in action. Not really anyway it could have done any worse damage to the surounding area. If a demo company did that poor of a job they'd be looking at criminal negligence charges.
Here's a good article that explains it in plain terms.
http://www.pbs.org/wgbh/nova/wtc/collapse.html
I think the key point in the article is this:
Quote:
NOVA: The Twin Towers collapsed essentially straight down. Was there any chance they could have tipped over?
Eagar: It's really not possible in this case. In our normal experience, we deal with small things, say, a glass of water, that might tip over, and we don't realize how far something has to tip proportional to its base. The base of the World Trade Center was 208 feet on a side, and that means it would have had to have tipped at least 100 feet to one side in order to move its center of gravity from the center of the building out beyond its base. That would have been a tremendous amount of bending. In a building that is mostly air, as the World Trade Center was, there would have been buckling columns, and it would have come straight down before it ever tipped over.
Have you ever seen the demolition of buildings? They blow them up, and they implode. Well, I once asked demolition experts, "How do you get it to implode and not fall outward?" They said, "Oh, it's really how you time and place the explosives." I always accepted that answer, until the World Trade Center, when I thought about it myself. And that's not the correct answer. The correct answer is, there's no other way for them to go but down. They're too big. With anything that massive -- each of the World Trade Center towers weighed half a million tons -- there's nothing that can exert a big enough force to push it sideways.
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Geoschmo