Nails in the Coffin of Trade Seven

Close-ups from WTC-7 Collapse Footage Show
Unmistakable Signature of Demolition Charges

*Broken video links fixed*

Squibs along southwest corner of WTC-7 (mpeg)
 QuickTime version of above 

The above clip is taken from this longer video of the WTC-7 collapse, which itself is a small segment of the Naudet brothers' documentary "9/11" , (with enlargement and cropping by Webfairy) :

Full sequence from the 9-11 DVD

Looking at the upper right-hand corner of the building we see  a rapid series of small explosions travelling upward just as the building itself begins to fall.  The size, placement and timing of these "puffs" is very consistent with squibs from cutting charges of the type used in professional controlled demolitions, and in fact nothing but small explosive charges could create such an appearance.  The decreasing volume of  the building from the collapse itself could not create enough pressure to cause such localized high-velocity effects, and this early in the collapse would have only created a modest overpressure.  

Other video evidence of squibs:

 Larger mid-wall squibs in the WTC-1 collapse

Slow-motion view showing several well defined, roughly spherical squibs

More distant view of WTC-1 from the north

Two very sharp and elongated squibs can be seen on the right side of the building

(The above are from the Collapse Update page)

Other evidence for explosive cutting charges

More on the WTC-7 collapse

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