Once I’d got a handle on it, the Twin Tower collapses made perfect sense. Not so WTC7; I still don’t know what happened to that. I’m not surprised that it fell down, but its relative neatness seems decidedly odd. Weird building, weird circumstances, weird collapse.
That said, I had another look at Chandler’s measurements last night, and that gave me another new idea. But it’s not likely to reveal anything about intent.