7. It’s difficult if not impossible for hydrocarbon fires like those fed by jet fuel (kerosene) to raise the temperature of steel close to melting.
Professional demolition, by contrast, can explain all of these facts and more. Demolition means placing explosives throughout a building, and detonating them in sequence to weaken "the structure so it collapses or folds in upon itself" (p. 44). In conventional demolitions gravity does most of the work, although it probably did a minority on 9/11, so heavily were the towers honeycombed with explosives.
1. Each WTC building collapse occurred at virtually free-fall speed (approximately 10 seconds or less).
2. Each building collapsed, for the most part, into its own footprint.
3. Virtually all the concrete (an estimated 100,000 tons in each tower) on every floor was pulverized into a very fine dust, a phenomenon that requires enormous energy and could not be caused by gravity alone ("…workers can’t even find concrete. ‘It’s all dust,’ [the official] said").
4. Dust exploded horizontally for a couple hundred feet, as did debris, at the beginning of each tower’s collapse.
5. Collapses were total, leaving none of the massive core columns sticking up hundreds of feet into the air.
6. Salvage experts were amazed at how small the debris stacks were.
7. The steel beams and columns came down in sections under 30 feet long and had no signs of "softening"; there was little left but shorn sections of steel and a few bits of concrete.
8. Photos and videos of the collapses all show "demolition waves," meaning "confluent rows of small explosions" along floors (blast sequences).
9. According to many witnesses, explosions occurred within the buildings.
10. Each collapse had detectable seismic vibrations suggestive of underground explosions, similar to the 2.3 earthquake magnitude from a demolition like the Seattle Kingdome (p. 108).
11. Each collapse produced molten steel identical to that generated by explosives, resulting in "hot spots" that persisted for months (the two hottest spots at WTC-2 and WTC-7 were approximately 1,350o F five days after being continuously flooded with water, a temperature high enough to melt aluminum (p. 70).
Controlled demolition would have required unimpeded access to the WTC, access to explosives, avoiding detection, and the expertise to orchestrate the deadly destruction from a nearby secure location. Such access before 9/11 likely depended on complicity by one or more WTC security companies. These companies focus on "access control" and as security specialist Wayne Black says, "When you have a security contract, you know the inner workings of everything." Stratesec, a now-defunct company that had security contracts at the World Trade Center and Dulles International Airport, should be investigated, among others, because of the strange coincidence that President Bush’s brother, Marvin P. Bush, and his cousin, Wirt D. Walker III, were principals in the company, with Walker acting as CEO from 1999 until January 2002 and Marvin reportedly in New York on 9/11. At least one report claims that a "power down" condition prevailed on September 8–9 (pdf, p. 45) at WTC to complete a "cabling upgrade," presenting an opportunity to plant explosives with low risk of detection.
A related point is that demolition companies go to considerable expense to wire steel-framed skyscrapers with explosives to produce safe implosions, and they would love to do it more cheaply by simply setting two small fires like those that (allegedly) caved in building 7. Apparently, the terrorist-inventors have kept this new technology secret.
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