Jose Diaz of California wrote:
I have read several articles concerning this and here are my thoughts. I have a physics degree but the arguments are simple.

1-Steel does not have to melt to weaken enough for a colapse. It is a metal so heat will travel through it to the top and botom floors.

2-Building 7 was damaged by the fall of the twin towers but it does not show on pictures taken from the north side.

3-Although people here keep ignoring the facts the three colapses are different from each other and the second tower did tilt to one side (you can see that on several videos). The hit on the first tower was more dead on, but higher so it took longer to weaken and fall in a more "symmetric" manner. If you watch the videos on this very web site of WTC 7 falling, there is no "pankaking", at least not just that. It falls backwards and partially from is own weight (fires) from the damage on the south side of the building caused by the not so "clean" fall of the twin towers earlier in the day.

I see a lot of wishful thinking at play here and too much pride to admit that one might have gone down the wrong path.