Originally Posted by willravel

Does the picture I posted work for you? Do you see in the picture that the largest puff line, and thus the first collapse, occoured at the top floor? The videos are wonderful, but they are both too fast and also covered by debris to see for sure. The pictuer I posted is a frame from your first video. The second video you posted doesn't show the top of the building. The third video is probably the best overall of the North Tower crash, but doesn't show the detail of the first.

Sigh?