What about the collapse of building 7?

The fire-fighters that were present at ground zero on 9/11 said that they heard explosives go off just like a demolition. The media did not pay attention to them for long though. The mere+ -1,000•F heat from jet fuel is not enough to make even the very building its burning collapse (all at once--if at all). They found thermate in the debris (an advanced form of thermite. I believe it is thermite with sulfur added). There are many videos out there. If I remember correctly, thermite can burn at 2,500-3000•