Stanislav Saves the world!

On this day in 1983, Stanislav_Petrov saved the world.
Hard to believe?, Well, it appears that by refusing to believe his early warning system's report that the U.S.A. had launched a Nuclear Missile, followed by 4 more, he stopped the U.S.S.R from launcing a counter strike. Thus, he singlehandedly averted a global Nuclear war.

Nice one Stan!