Talk to Rosie First!

"The aircraft moved through the building as if it were a hot and fast lava flow," Sozen says. "Consequently, much of the fireproofing insulation was ripped off the structure. Even if all of the columns and girders had survived the impact - an unlikely event - the structure would fail as the result of a buckling of the columns. The heat from an ordinary office fire would suffice to soften and weaken the unprotected steel. [emphasis added] Evaluation of the effects of the fire on the core column structure, with the insulation removed by the impact, showed that collapse would follow whatever the number of columns cut at the time of the impact."

Source: Purdue University News – Purdue creates scientifically based animation of 9/11 attack Come on! You do not expect me to believe that? Who ya going to believe Rosie O'Dumbell or scientists & physicists at Purdue University – the home of the Purdue Boilermakers? What kinda idjit you think my mother raised?

Anyway a hat tip to Little Green Footballs.

See the simulation for yourself:

Or A direct link to YouTube