That was, by all indications - a False Flag PSYOP/National Security Day Event. Whatever hit the towers, was unlikely to have been the planes we think they were. OPERATION NORTHWOODS is a similar series of "Contingency Plans", to whatever actually happened on "9/11". In those plans, they swap planes while flying over Eglin AFB in Florida - landing the initial plane with CIA people on board, and replacing it with a drone, that they would blow up. https://archive.org/details/OperationNorthwoods
Whatever hit the Pentagon, was way smaller than the 757 that say made that tiny initial hole.
I personally remain agnostic about the events in New York, except to say that the official narrative and the study by Bazant are just complete hogwash. But there's some people who think there were "no planes" in New York - and that plane impact we see on screen was all done with CGI and "Holograms" and pre-planned explosives and gel-ignite charges. Personally, that strikes me as getting too far down-into-the-weeds.