I don't really understand how anyone believes any of these conspiracy theories. Gravity pulls stuff downward, toward the center of the Earth. Fire and gargantuan amounts of kinetic energy damage structural integrity. The WTC towers fell down. They didn't explode. They didn't really implode all that much either, and there are lots of rational non-conspiratorial hypotheses about why the bit of implosion that did happen occurred (fire eats oxygen, causing a vacuum, the main central supports collapsing downward and pulling the outer walls inward, and so on).

I mean, don't take my word for it. I'm just a dude. But I found that those guys with doctorates in engineering and metallurgy that were consulted for the NIST study were pretty credible. If they were just some dudes, well, I wouldn't be as apt to believe them, but a doctorate in their field and 30 or 40 years of experience, okay, I have to take them seriously. Especially when almost all of them agree.