The 93 Bombing

That 93 bombing was designed to do what happened in 2001 it was in the parking as i remember the garage and it did some damage but not very much damage it didn't take down the building. The way they were built weren't structurally built like the empire state building they were built kind of like a a large corridor vertical corridor with cement slabs for each floor but without internal and reinforcement. Once one got started to fall where it was hit and the girder started to melt then it would fall down to the next one and add weight to the next ones before it collapsed.