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[–] prairie 0 points 1 point (+1|-0) ago 

Building 7 was not a controlled demolition. It went down all at once rather than domino style or center first.

I think that controlled demolitions are not all at once because that would spread more rubble or something. It doesn't mean that they can't be all at once.

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[–] BlackSheepBrouhaha ago 

Controlled demolition usually involve explosives in the supports. Technicians time these explosives so that the first explosion sets the direction of fall, like a first cut to fell a tree.

Given the damage to the Verizon building one must conclude WTC7, aimed for the Verizon building, the controlled demolition was done by a man amateurs, or it went down as we're told.

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[–] prairie ago 

Why would they want to carefully aim the building if it was to appear that the collapse was due to fire and damage?