Posts in Guest writers
A Mechanical Engineer's take on the 9/11 WTC building collapses

I'll try to keep these points as separate and clear as possible, to avoid accidentally muddying the waters.  The points of concern seem to be 1) collapse speed and the visual lack of resistance, 2) the apparent homogeneity of the collapse (simultaneous yielding of multiple structural members), and 3) the temperature of the fires.  

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