WTC1 E Perimeter Falling






The east side is on the left, not visible in this photo.

This is the earliest moments is the collapse. We see failure along floor 98 (97?) on the NE corner (red arrow).



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Photo archive of debris in the area east of WTC 1 here

Dropping of the Upper Section





Please note the dark spot centered in the red circle. We will see it is the top of a perimeter sheet.
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The top of this perimeter sheet seems to have been ejected quite rapidly from floor 98. Notice how far it has been displaced from the building at this time.

The video clip linked below demonstrate how quickly the top portion shot away from the building.

Both the BBC and the Sauret clips capture the violent early movement of this dark mark well.


http://www.youtube.com/watch?v=WZ8wlKK15JM&feature=channel_page



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The dark mark can be traced to the trajectory of the leading edge of the falling sheet circled in red.





Dropping of the Middle Section




NORTHEAST VIEW - Unknown Photographer #1


Full size:
01) http://img853.imageshack.us/img853/734/c6019531.jpg
02) http://img21.imageshack.us/img21/7084/c6019542.jpg
03) http://img20.imageshack.us/img20/18/c6019553.jpg
04) http://img218.imageshack.us/img218/1677/c6019564.jpg


05) http://img225.imageshack.us/img225/8493/c6019515.jpg
06) http://img828.imageshack.us/img828/2627/c6019526.jpg
07) http://img215.imageshack.us/img215/5826/a6019137.jpg


08) http://img64.imageshack.us/img64/8823/a6019148.jpg
09) http://img863.imageshack.us/img863/4813/a6019159.jpg
10) http://img853.imageshack.us/img853/8663/a60195910.jpg



NORTHEAST VIEW - Unknown Photographer #2


Full size:
01) http://img42.imageshack.us/img42/3262/nistfoiar31set104hiny59.png
02) http://img5.imageshack.us/img5/3262/nistfoiar31set104hiny59.png
03) http://img832.imageshack.us/img832/3262/nistfoiar31set104hiny59.png
04) http://img576.imageshack.us/img576/3262/nistfoiar31set104hiny59.png


05) http://img854.imageshack.us/img854/3262/nistfoiar31set104hiny59.png
06) http://img35.imageshack.us/img35/3262/nistfoiar31set104hiny59.png
07) http://img696.imageshack.us/img696/3262/nistfoiar31set104hiny59.png
08) http://img853.imageshack.us/img853/3262/nistfoiar31set104hiny59.png
09) http://img29.imageshack.us/img29/3262/nistfoiar31set104hiny59.png





Dropping of the Lower Section








From this image