I have not seen the Popular Mechanics article before, so I have printed it out for analysis - I will respond to your request to answer its account of 911, though I must say the Pentagon section of its account looks too superficial to be bothered with - still, I will digest what PM has to say and will get back to you.
911 events deserve better than puerile off-the-cuff remarks so I will take the time to read what PM has to say, unlike others I'm happy to read material contrary to my own opinion - after all I was once an ardent supporter of the US government claims on 911..... until subsequent consideration led me down a very different path.....