[olvar]

The link you provide is not relevant to your point. Is a simulation of the impact, but says nothing about the collapse of the buildings.

[jussij]

Are you serious?

A video showing how the structural integrity of a building is severely compromised and it doesn't explain why the building collapsed?

Seems like a fairly myopic view to me.

I look at that video and to me it highlights the amazingly good structural engineering used in the design of the building.

For it to have taken such a massive hit and still manage to stay standing for as long as it did is a credit to the designers.

If only they had done a better job spacing the emergency exits many lives would have been saved.