pressurized cabin? At sea level? So what pressure would that be? And how would that “pressure” be important for stabilizing the fuselage?

Bottom line: Where are the wing sections, fuselage sections, tail section, jet engines, passenger bodies, passenger luggage? Vaporized you say? There has never been a crash of a passenger jet airliner that has not left all of the above mentioned wreckage strewn about the crash site. Also there is a maximum speed that a commercial jet can fly at sea level and it’s nowhere near 500mph. It doesn’t have the power to do that, and if it did, the plane would break apart due to the resistance of sea level air.

There is no known case of any airplane collapsing due to loss of cabin pressure. Neither does cabin pressure have anything to do with what happened on 9/11 at the Pentagon. Why don’t you just SHUT, UP