Re: The Truth?
Actually, the whole system is geared towards executing the launch order as swiftly as possible, since cold war reasoning is behind the current system. In those scenario's, the US would detect a swarm of soviet missiles, meant to decapitate the US leadership, thus making a launch order impossible. So a quick reaction is paramount.
The commander in chief gives the launch order, after a quick conference with advisors about the targets and assets used for the strike. That launch order is validated, but only to check that the person giving the order, is in fact the president. That's it, there is no psychological check of the president, or additional checks along the chain. Once the validation is done, the whole system is geared towards only one task, making sure the order is executed as swiftly as possible. https://www.bloomberg.com/politics/graphics/2016-nuclear-weapon-launch/