Lots of easter eggs in this interview. Silverstein etc... but listen to Trump's answer to the question asked at (5:14) about the integrity of the buildings...
"How could a plane, even a plane, even a 767 or 747 or whatever it might have been, how could it possibly go through this steel? I happen to think they not only had a plane, but had bombs that exploded almost simultaneously, because I just can't imagine anything being able to go through that wall..."
"It just seemed to me that, to do that kind of destruction, is even more than a big plane, because you're talking about taking out steel, the heaviest calibre steel that was used on a building. I mean these buildings were rock solid..."
Also worth noting the steel column vaporising at (2:03).
Best way to red pill normie friends is take them to a shooting range with a piece of steel beam and a high-powered rifle. Once somebody sees that a solid projectile traveling over 2,000 mph can't penetrate the beam. They will know a hollow aluminum cylinder cannot break through the beams at a couple hundred miles per hour.
The beams at the height of impact are supporting over a dozen floors of the building so they would be well over an inch thick.