And, like, I want to mention here that the hijackers who successfully wrecked three airliners and murdered everyone on board (including themselves) passed all security screening. We knew who they were! If we had had internal passports in 2001, that would have changed nothing at all.
AIUI, these folks were armed with box cutters and a willingness to kill themselves, everyone on the plane, and everyone in the building they intended to crash into. Folks regularly get knives through TSA screening. There have been numerous official reports about the fact that TSA failed to find > 90% of the weapons and explosives federal red-team employees put into their luggage.
The only thing that has stopped another 9/11 is reinforced cockpit doors that lock from inside the cockpit. Had the cockpit doors been solid and locked, those hijackers would have gotten the shit beaten out of them by passengers and those planes would have made safe emergency landings.
AIUI, these folks were armed with box cutters and a willingness to kill themselves, everyone on the plane, and everyone in the building they intended to crash into. Folks regularly get knives through TSA screening. There have been numerous official reports about the fact that TSA failed to find > 90% of the weapons and explosives federal red-team employees put into their luggage.
The only thing that has stopped another 9/11 is reinforced cockpit doors that lock from inside the cockpit. Had the cockpit doors been solid and locked, those hijackers would have gotten the shit beaten out of them by passengers and those planes would have made safe emergency landings.