The temp of burning jet fuel doesn't burn hot enough to burn steel...enough that it would become weak enough to have the building collapse on itself.
There were workers inside the sub level floor areas that were on record saying they heard several explosions inside the building. Any controlled demolition expert will say that was a controlled demolition.
Hey you know who was given a $50M contract to run security for the WTC complex prior to 9/11? Securacom, a company that was headed by Marvin Bush.
2016 Adopt-A-Chief: #56 Derrick Johnson