The very thing that Griffin points to as a feature of a fire caused collapse we can see in photos of the World Trade Center.

Griffin writes, "in fire-induced collapses---if we had any examples of such---the onset would be gradual. Horizontal beams and trusses would begin to sag; vertical columns, if subjected to strong forces, would begin to bend. But as videos of the towers show, there were no signs of bending or sagging, even on the floors just above the damage caused by the impact of the planes." But contrary to what Griffin claims, there were indeed signs of bending or sagging. Witnesses reported it and photos document it. Griffin is simply wrong.