it can because on the towers it was a central spine (the elevator shafts) that did all the holding up. the edifice was not holding the building up. as the floors went down they had, essentially, a rail to ride down the middle. Also- the air pressure that must have been building on the lower floors as the upper part came down may have broken them before the top ever got there.


Just a few of my ideas, but I can speak with some certainty as I do teach physics and both my parents are architects. IDK though.