John Grossbohlin wrote:

Another non-issue... Armored cockpit doors installed post-9/11 makes
anything but bombs pretty much useless in commandeering airliners. That is
what led to the changes recently that allows for small pocket
knives, nail clippers, etc., to be carried on-board again...

How about getting past the metal detectors at federal courthouses? The
Capitol? And other similar places.

Fortunately, my state (Texas) allows regular concealed handguns in the
capitol, the governor's office, just about anywhere.