And now for a video that is completely different.

http://www.youtube.com/watch?v=z0kUICwO93Q

No one else seems to be demanding to know the tons of steel and tons of concrete on every floor.

The NIST tells us the building oscillated for 4 minutes. How do you compute how much kinetic energy shook the entire building versus how much did structural damage at the point of impact? Isn't that necessary to do an accurate computer model?

psik