The Surprising Meaning of Vanishing Flames and Black Smoke
The fires in the two towers followed similar courses. For the first few minutes there were widespread visible flames, and light gray smoke. As time progressed the flames dwindled and the smoke darkened, the South Tower's becoming black by the time it crumbled, and the North Tower's becoming dark gray. Normally, dark sooty smoke and an absence of visible flames would not be taken as signs of raging infernos. But on a day when so many expectations are violated, couldn't those appearances instead signify particularly ominous and destructive fires? We were treated to a number of "experts" who apparently thought so.
The BBC quoted "structural engineer" Chris Wise on September 13.
The same article quoted the buildings' construction manager, Hyman Brown, who publicly agrees with the official story.
The "24,000 gallons" is repeated often. That is the jets' fuel capacities, not the amount they were carrying at impact, which was apparently around 10,000 gallons. Few reports mentioned that in the South Tower strike, most of the fuel probably burned up in the impact fireball. Is Mr. Brown really so ignorant of the basic facts of metallurgy and chemistry to think that jet fuel fires could have produced fires hot enough to melt steel, with its greater-than 1500ēC melting point, when it normally requires pressurized air (such as in a blast furnace) to achieve temperatures much over 800ēC? In all likelihood the fires, lacking optimal air mixing, burned far below temperatures, that could have seriously weakened steel.
For a more extensive list of examples of the promotion of the fire-melts-steel idea, see The Core Meltdown Theory.
Ironically, claims that fires melted the WTC steel by defenders of the government's story ultimately led to high-profile attacks on "conspiracy theorists", alleging that they failed to understand that the official theory required only that fires weaken -- not melt -- structural steel. For example, Michael Shermer erroneously implied that 9-11 Research mis-stated the official theory, and Popular Mechanics suggested that the fire-melts-steel claim was used by official story detractors as a straw-man argument.