Ddxx Keep reading and investigating and learning. The last bit about the planes did not have the same amount of factual detail as the construction methods. You are on the path to enlightenment, though.
Your post about the floor joinings is part of the truth. Look for the follow up work on the metallurgy of the recovered steel from WTC1 and WTC2.
Did you realise the designs for WTC1 and WTC2 were not the same?
