Katlaughing said, in part:

There is one video in, I think it was, the first link, to some NYC firemen talking right after...they said it was like a controlled demolition

Sure. But the operative word here is like. You don't quote them as saying (or even speculating) that it was a controlled demolition. And just watching the video of the collapse verifies that the pattern was indeed like that of a C-D. That is, once it started, the impact of the upper floors falling carried the lower floors progressively downward.

Dave Oesterreich