Thanks...
I thought I remembered that well into the 1960s, people could CCW or Carry-On Firearms.
LEO, Prisoner Transport, G-Men, Jewelry Salesmen, or anyone else.
No one would have known anyway, untill the advent of the force-funnel lines through the Metal Detectors was begun.
Yeah...the 'Hijackings to Cuba' ( which were probably intel projects anyway, or even if not, then resulted from them regardless, ) and then, I guess,
"D.B.Cooper"...
I flew a few times in the 1950s and early 1960s.
Everything was very relaxed, civilized, everyone dressed nicely, one boarded by ascending a portable Stair out on the Tarmac, friends and relatives and so on, stood at a low fence, and waved.
I am not sure how suspension of Constitutional rights is rationalized, in contexts of this kind - Airplanes, Trains, Busses, Cabs.
Airline Pilots used to be able to perform Marriages, same as Sea Captains, since when in an American Registered Airplane and over American Soil, was one understood to be in-effect, 'on' American Soil.
Pilots did carry personal Firearms, also.