Algodoo

This tower can stand still without falling at his own, but you can interfer just swaying it or destroing some columns.:tup:

some parts are not thought out to be the 9/11 attaks but its just a way to you undertand how its collapse, and i made this to not prove any thing about conpiracy, or NIST explanations.:*)

some people made the twin towers too and the empire state building but i not liked the way of they collapse or after some minutes they collapse ats own. and then i have am idea why not make my own tower, there it is