----- Original Message ----- From: "Horn, John" <[EMAIL PROTECTED]> To: "Killer Bs Discussion" <[email protected]> Sent: Friday, January 06, 2006 9:25 AM Subject: RE: "Let's Roll"
> On Behalf Of Dave Land > And it's not just that people described the plane hitting the > tower as "an explosion", it's the reports -- many of them at > the time they happened -- of "there goes another explosion". > There are radio recordings of lots of firefighters reported > "secondary explosions" > throughout the building at various times, and footage of > reporters reacting to explosions way after the both planes had hit. I don't think I was clear enough earlier. I was actually referring to these reports of secondary explosions not the initial explosion from the airplane hit. >Again, there probably were lots of things happening that could be >described in the chaos of the moment as explosions. But that >doesn't mean they were caused by bombs preset in the building. I'm >not sure that I buy the argument that the average firefighter is >trained to know the difference between an explosion caused by a bomb >and by other things. I'm sure they are trained to know about the >"normal" fire-related explosions and such. But nothing about the >WTC attacks was normal. It was all outside of their experiences and >training. The scale of the damage and the chaos was beyond anything >I'm sure most, if not all, of them had ever seen. To add to this argument, I'll quote from one of ( the scientific American site) the technical web sites I listed: <quote> Others have pointed out the possibility that the aviation fuel fires burned sufficiently hot to melt and ignite the airliners' aluminum airframe structures. Aluminum, a pyrophoric metal, could have added to the conflagrations. Hot molten aluminum, suggests one well-informed correspondent, could have seeped down into the floor systems, doing significant damage. "Aluminum melts into burning 'goblet puddles' that would pool around depressions, [such as] beam joints, service openings in the floor, stair wells and so forth...The goblets are white hot, burning at an estimated 1800 degrees Celsius. At this temperature, the water of hydration in the concrete is vaporized and consumed by the aluminum. This evolves hydrogen gas that burns. Aluminum burning in concrete produces a calcium oxide/silicate slag covered by a white aluminum oxide ash, all of which serve to insulate and contain the aluminum puddle. <end quote> Such a scenario is consistent with multiple explosions. Indeed, since aluminum, iron, and oxygen are the prime components in thermite...and I know from trying to find cast aluminum blocks that the melting and the flash point of aluminum are close, one has the potential for lots of explosions with the hot materials at hand. Second, the amount of kinetic energy produced by each collapse was truly amazing: a trillion joules. To put it in perspective, using the specific heat of stainless steel at 25C, this is enough to heat 2000 metric tons of steel from 0C to 1000C. Dan M. _______________________________________________ http://www.mccmedia.com/mailman/listinfo/brin-l
