Go back in time and do something to prevent Vasily Aleksandrovich Arkhipov from becoming the Executive Officer on the B-59 Soviet nuclear sub in October 1962. He’s the guy who talked the Captain and the Political Officer out of launching the nukes when they thought they were being attacked by the US Navy during the Cuban Missile Crisis. His persuasiveness is generally considered to have avoided WWIII from starting then.
Go back in time and do something to prevent Vasily Aleksandrovich Arkhipov from becoming the Executive Officer on the B-59 Soviet nuclear sub in October 1962. He’s the guy who talked the Captain and the Political Officer out of launching the nukes when they thought they were being attacked by the US Navy during the Cuban Missile Crisis. His persuasiveness is generally considered to have avoided WWIII from starting then.
You could also flip the switch that was literally the only thing keeping the nuke from exploding over North Carolina in the Goldsboro incident.
Nuke going off over US soil at the height of the cold war could very well have started everyone firing.
He probably literally saved the world, he should really be talked about more
The scary part is, he’s not the only one
https://en.wikipedia.org/wiki/Nuclear_close_calls