Scientists simulate jet colliding with World Trade Center
A computer simulation of the September 11, 2001, attack on the World Trade Center, posted on YouTube by Purdue University researchers, shows how hijacked planes crashed through the twin towers, stripping fireproofing materials from the steel columns and eventually leading to their collapse.
http://www.youtube.com/watch?v=cddIgb1nGJ8
http://www.youtube.com/watch?v=cddIgb1nGJ8