I remember when the older B57s were replaced by the first B61s, which was a big upgrade at the time. As an Emergency Actions Team member I spent many hours practicing manual unlocking, disabling, dis-enabling, and other permissive action link procedures on the new B61s. They were pretty sophisticated and had features that are probably still classified so I won’t elaborate. My guess is that these also have some more highly classfied features that we will never be privy to.
I served as a loader on my last deployment (they used to make up parts of the loading teams from non-ordinance specialties...I don’t recall why) and we would do the loading drills...I recall it was highly ritualized, reading checklists from manuals as we did it, and they had members from the Marine detachment standing guard as you did it in full combat gear (back when they still had Marine detachments on carriers)
Saw a guy get clocked with the stock of an M-16 one time by a Marine as he ran through the cordon...I think he was a damage control guy on the way to a fire alarm or something and he cut through the perimeter in a rush, not thinking, and the Marine knocked him on his ass. They were all business there.
Dang. That was a long time ago.
Were you Air Force?
Quantum teleportation of the warhead using GPS coordinates