To: Don Earl who wrote (9141 ) 12/5/2004 6:13:07 AM From: sea_urchin Read Replies (2) | Respond to of 20039 Don > It's not that I doubt such charges would powder some concrete in the immediate vicinity, I just don't believe it would powder a whole building's worth. You have put your finger on it. I would go further and say that what happened to WTC1 and 2 is not explained by the use of conventional explosives, which would have caused a flash of flame (unseen in WTC) and an accompanying blast (seen to only a limited extent). What occurred is that the buildings virtually disintegrated in situ . Accompanying this was an enormous amount of heat. As per the link you cited: >>The Towers' Concrete Was Pulverized in Mid-Air Photographs and videos document dense clouds of pulverized concrete dust being ejected from the towers within the first seconds of the collapses. That these thick opaque light-colored clouds carried the bulk of the floor-slab concrete is verified by the composition and fallout pattern of dust around Ground Zero. Within the first few seconds of the collapses, the motion of the falling top relative to the intact structure was only a few feet per second. Clearly the speed of the falling top relative to the building was insufficient to convert concrete to fine powder. << Or this link:911research.wtc7.net >>Non-Metallic Building Parts and Contents Were Thoroughly Pulverized The concrete, glass, drywall, insulation, and other non-metallic building parts were pulverized to mostly sub-100 micron powder. Nearly all office contents were pulverized beyond recognition. 1000 bodies were "vaporized", preventing identification, even with advanced DNA techniques. The towers turned to dust << As I perceive it, your problem seems to be that you are attempting to reconcile what happened to the WTC towers with a "standard" demolition (as clearly occurred with WTC7). With this method, holes are drilled in the supporting concrete columns at critical places, charges are placed in these holes and timed to explode in a way that sequentially cuts the columns. The structure then falls into itself under the influence of gravity. The idea is to use the least amount of explosive consistent with producing the necessary result. What happened to the Towers cannot be explained by this "standard" technique. Indeed, in the first place, it would seem to have been impossible for people to have surreptitiously drilled hundreds of holes in the central concrete columns and throughout the building without being noticed. What we see is probably something we have never seen before -- the complete disintegration of two enormous concrete-steel structures, and in seconds. I cannot state what explosives or explosive-like substances were used. But, as I mentioned previously, there is enough evidence that a great quantity of "something" was placed in the basement, the explosion of which caused a seismic event which preceded the fall of the buildings and a great deal of heat afterwards, and also that "explosions" occurred sequentially in the towers as they fell/disintegrated.