Yeah, 9/11. Not the most enjoyable topic, but it's one I am almost inexplicably passionate about.

WTC-7

I couldn't do better than what Flesh Simulator lays out here, although he gets most of this from a book, and I hope to go through and lay out each point in text form here.

The Building between Six and Eight
https://www.youtube.com/watch?v=vOZToel_368&t=301s