Yes, my comment is only in regards to the two main towers. I didn't study tower 7 in detail, but from what I understand it was a building that had an interior b

Yes, my comment is only in regards to the two main towers. I didn't study tower 7 in detail, but from what I understand it was a building that had an interior backup generator with enough fuel for a week or two and that is what caused the large fire. But when the 9/11 truth movement was in its prime, most of the focus was on towers 1 & 2 and once I was satisfied with the explanations for those I didn't bother looking into the secondary claims about tower 7. Mostly because once you have the first two towers collapse all the heat and debris from the pyroclastic cloud it makes doing the math much harder. The heat calculations for the two planes were relatively straightforward, other than the degree of fireproofing displacement during impact.