Andrew A. McLachlin wrote:
Mr Keith McConnel, indeed temperature increases do result in increased creep rates of the steel (destrengthening of the steel over time), but your argument fails because most of the jet fuel burned outside the buildings, hence the large fireballs. Office combustibles in the building burned at low temperatures (lots of thick black smoke indicates lack of oxygen); the resulting creep rates are therefore low, which would have been taken into account when they designed the building to withstand being hit by fully loaded planes. Also, how do you explain the molten iron discovered in the basement of WTC 1,2 and 7. Satellite imagery after the collapse show temperatures in excess of 1000 degrees celcius at all 3 sites, plus many videos showing molten iron being dug up months later. The amount of energy needed for this melting cannot be attributed to jet fuel or to the kinetic energy of the collapse, which would leave a gigantic pile of rubble (not a hole in the ground).

People, do your own research, find these videos on the net, and see for yourself. Don't let so-called experts tell you otherwise.