After the first two buildings fell it was out of sympathy that Building 7 decided it also could no longer stand and so 8 hours later it could no longer keep from collapsing proving once and for all that buildings have feelings and can experience grief. Of course that is just the official theory, the other theory of course is that it was used in the control demolition of the twin towers and to destroy evidence they destroyed that building as well., but that is a tin foil hat conspiracy theory of a bunch of engineers and architects.What do you know of building #7?