Declassified documents confirm that superpowers came dangerously close to nuclear war in 1983!

[PeoViejo]

3. Actually, St. Ronnie was on the way to the secret command bunker.

but changed his mind at the last Minute. The Soviets knew about the highly classified COG (Continuation of Government) program and were watching the DC area facility where he was headed to command Able Archer '83. Their orders were to launch an all-out pre-emptive nuclear strike against NATO if he went into the Bunker. The FBI agent, Robert Hanssen was the one who gave them all the details of the COG program.
Hanssen was not supposed to be privy to the information, but he ingratiated himself with the CIA unit that was in charge of GOG and somehow, managed to get the plans and turn them over to the Soviets.
As he was arriving at the facility, alarms were going off all over that the Soviets were preparing to strike and his staff convinced him to cancel the Day's events.
An innocent CIA Officer that worked at the facility was blamed for the failure and Hanssen was eventually put in charge of the investigation.