Ah the old laughable popular mechanics source AGAIN you coincidence theorists always retreat to try and win an argument when your losing.the warren commission report of the kennedy assassination.this always goes ignored, but here goes again for the hundreth time- read david ray griffiths book DEBUNKING THE 9/11 DEBUNKING.an answer to popular mechanics and other defenders of the official conspiracy theory.He interviews demolition experts in that book that prove popular mechanics is a fairy tale.
Ad hominem attack, again. You deflect the issue, again.
Popular Mechanics merely recited what the Lamont Lab at NYU concluded on 9/11 - that the seismic graphs showed a wave pattern inconsistent with an explosion.
The conspiracists' irrationality has gotten such that they would deny that the earth revolved around the sun if Popular Mechanics said so.