BYU physics professor Dr. Steven Jones, as well as Kevin Ryan of Underwriters Laboratories (the company that certified the steel used to construct the WTC), along with Aaron Swirsky, who was one of the 14 WTC Architects, Jim Hoffman of wtc7.net, and Dr. David Ray Griffin, explain why "fire melted the steel" is completely insufficient to explain the complete destruction of the World Trade Center towers.

This is a clip from "Improbable Collapse". Get the DVD at improbablecollapse.com