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Politics : Sioux Nation -- Ignore unavailable to you. Want to Upgrade?

To: SiouxPal who wrote (16125)	5/8/2005 2:21:40 PM
From: Wharf Rat	Read Replies (2) \| Respond to of 361214

The end of our oil-based economy will be the single most critical event in the long history of human civilization, and each of us will live to see it and be responsible for dealing with it. Human development has been propelled by revolutions in technology powered by revolutions in energy acquisition: the agricultural (solar energy) revolution of a few millennia ago, the industrial (coal/oil) revolution of a few centuries ago, and the recent electrical revolution. The lack of oil will send us reeling back to a pre-industrial economy. Message 21304364

To: SiouxPal who wrote (16125)	5/8/2005 2:54:38 PM
From: bentway	Read Replies (1) \| Respond to of 361214

I'm aware of the central supports around the service core, to which the floor trusses from the outer skin were joined. Not your typical boxes of steel beams. The main structure of the building was still it's tubular skin. Perhaps the steel, which also had to be shipped to the original building site, arrived in 30' sections? I saw a great animation of the collapse using a cutaway WTC somewhere, which made a lot of sense to me. One floor collapsed onto another, overloading it, and so on to the ground, with the structural core and skin preventing toppling as it was sucked in at the top. pbs.org