Source: https://www.youtube.com/watch?v=VAkTbyENZ5s An impressive project for one individual, Kostock's simulation is an amazing static model of WTC7, and gives a reasonable facsimile of the collapse, given the limitations of what he is doing. People will surely pounce on the fact that the outer skin does not behave the same as the real event. But as with the NIST simulation, this demonstrates an interior collapse followed by the exterior bucking and falling. Overall a very impressive effort. It also provides some new viewpoints, that might be helpful perspective.