The jet fuel didn't have to melt the I-beams! Just weaken a small amount. Can you imagine the load they were carrying. I can on imagine that when the airplane hit the building a cascade of jet fuel would have been everywhere! Remember Jet A will not flash off like gasoline. As for the pentagon, does anybody remember the Value Jet crash in the Everglades? There was no airplane to recover! Airplanes are only made to fly, not survive the impact of a crash! It's really hard for me to believe people waste this much time over analyzing this event.
