All this talk of psychological testing and number of possible victims had me thinking. I had a co-worker who literally had his finger on the button. He was a member of a Missile Combat Crew in the 70s. I figured someone with the power to kill millions would have to have a bunch of psychological testing. Granted, he could not physically do it alone but with the right personality the other crew member might be convinced. I put the question to him. He said he does not recall any such testing. He needed a top secret clearance and some kind of nuclear rating. But no psychological testing.
So, which pays off more? Testing or 2 person crews? Or a mix?