What's wrong with, and I quote:
"It appears therefore that the official concept of a free fall collapse of the upper portion through the initiation storey, due to heat effects from fire, is a fantasy. If the temperature did become high enough for collapse to occur it could not have happened in the observed manner. In particular it could not have been sudden and thus could not have produced the velocity, and hence the momentum and kinetic energy, upon which the official story depends for the second stage of collapse. In contrast, all observations are in accord with the use of explosives in a timed sequence."
Many steel structure buildings have been on fire and in most such events everything has burnt except the steel structure itself that afterwards look like a skeleton. Actually a steel structure building often consist only of 10% steel and the rest is concrete, gypsym, glass, cables, pipes, vent ducts, insulation, furniture, etc., the latter being pulverized by the heat unless it is consumed by the fire. If the steel structure skeleton was subject to compressive loads during the fire you may also see that it has deformed locally, slowly, ... but never suddenly collapsed ... with almost free fall velocity through totally intact structure.
Simply speaking the WTCs were much too strongly built to allow any collapse under any circumstances due to release of its inherent potential energy. So extra energy must have been introduced and it seems to have been released very suddenly ... and not only inside the so called initiation zone but in other locations.
