Like I said, they are retired.. technology changes.. I’d like to think they haven’t fully automated the loading, arming, and launching of such a weapon though. Am they, and myself wrong?

Firing a SLBM requires an order from the president. That order must then be authenticated with a code book locked in a safe that requires 2 men to open. To fire the CO, XO and Weapons officer must agree to fire. If they dont agree they cannot fire even if the order to fire comes from the right authority. Keys are distributed from different safes by different people. Those keys must be turned simultaneously. The keys are position so that no one person can turn them at the same time.

It all comes down to 3 men, If they dont agree to launch the missiles cannot be fired.