It turns out the only camera pointed anywhere near the impact site was the low-FPS guard shack camera.

Ok well I know that. Have you seen the footage? it looks way too small to be a commercial plane, and it's a black and white object, like the drones at that time, and the author claimed it made a distinctive shrieking noise like drone missiles at that time. You didn't address any of that.

This is just a common myth.

OK, well the crazy dude that wrote that book had references, and you're just telling me to believe you. He claimed, and gave examples of, plane crashes in which the fuselage remained intact. Why did this plane evaporate when others allegedly do not? Why is the lawn pristine and showing no damage?

Also most of the plane debris ended up inside the Pentagon, not on the lawn.

So it was sucked through that small, cylindrical hole without damaging anything near it? This seems implausible.

So? Lots of things were carried away under tarps at all crash sites

I wouldn't know, but it was proposed that this could have been the drone they were carrying. Neither of us can claim to know.

Many people did die though, it's not like that part of the Pentagon was empty, just not as full as other parts.

Right, but it was mostly people working on the renovation, ie they were not people the pentagon cared about. IMO this is a small check mark in the conspiracy theory end of ledger.

Anyway, thanks for the rec. Maybe I'll delve into these murky waters sometime once Game of Thrones is over or something...