SAC (Strategic Air Command) used to have a PRP (Personnel Reliability Program) for aircrew members (bomber, tanker, or missileers).
So, in an ever more 'careful' and socialist society, yes.
PRP also covered maintenance personnel.
Yeah, one of the things that bothers me about flying, is that in decades past it was unheard of that a commercial pilot would NOT have learned to fly in the military. Hence, by the time a guy flew passengers he was experienced and well seasoned. If you didn't have military training you didn't get hired, period.
The stress of the combat training would have spit this psycho out by about year three. General aviation, maybe private flight instructor, that's as far as he would have gone.
Now any idiot can "sign up" to become a pilot. Isn't that nice?