I was a nuke weapons specialist in the early 70’s.
I don’t need any instruction on how its supposed to be.
My point is that security went to hell when they dissolved SAC in ‘92.
If you ever see them moving weapons out to the silos, you'd see that, too.
Nobody wants to be the one who let one fall into the wrong hands.
The bottom line, though (for the tourists' benefit) is that it takes more than just lax security (at a few levels) to even get the weapon on the apron, much less send it out of town--and this was more than one weapon.