April 7th in September 11 Attacks Research and Analysis by .

Hat-Truss Collapse Video

Video of the North Tower hat-truss/antenna falling. By removing the hat truss the exterior walls were free to fall away from the core as it was demolished. Nothing exotic to see here. Slow-Motion close-up courtesy nineeleven twentyfourseven: Related videos showing the “spire” falling straight-down in the same manner. During the …

Video of the North Tower hat-truss/antenna falling. By removing the hat truss the exterior walls were free to fall away from the core as it was demolished. Nothing exotic to see here.

Slow-Motion close-up courtesy nineeleven twentyfourseven:

Related videos showing the “spire” falling straight-down in the same manner.

During the cleanup they demonstrated how they make vertical columns fall straight down:

 

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