Yesterday, 26th of September was Stanislav Petrov Day.

A day to celebrate that you, me, everyone isn't nuclear vapour right now.
SP - disobeyed orders and military protocol, used his own thinking, and by doing so averted nuclear retaliation based on false alarms that would likely have caused a mass nuclear war in 1983.

Stanislav Petrov, often referred to as "The man who saved the world" died in December 2017