Don't get me started.
The impacts on those buildings did far more damage than people realize. One item the building designer never planned for was foundation damage caused by multiple 8,000 lb elevators falling 40 + stories after the cables had been cut by the planes.
Survivors who were in the parking garages at the time of impact said the damage they saw in the underground garages caused by the multiple falling elevators matched the damage done in the failed truck bomb of 1993.
The damage was so extensive that rumors were still flying in 2008 about truck bombs being used in conjunction with the planes.