Even if it is true that a X% loss in strength can cause a building to collapse, there is irrefutable evidence in the form of molten metal found within the wreckage that something burned much, much hotter than jet fuel that day.
There is also the witness to the explosion in the basement that caused substantial damage. This cooresponded with the the plane hitting the building. Is it possible that a bomb to damage the footing of the building was set off at the same time as the plane hit so that it would seem less suspicious?
Here is the guy giving his account of what happened in the basement (starts after one minute mark or so):
https://youtube.com/watch?v=QlEXoY1HCWI
What the hell is this guy talking about?????????????????????????????
He got blown away in the basement, yet there are NO reports from office workers being knocked to the ground. In fact, all accounts are just of the building vibrating somewhat.