It's being reported that Stanislav Petrov passed away earlier this year. He was 77.

And even if you don't know who Petrov was, he might be the reason you're alive today.

Petrov in 2015. Photo from Pavel Golovkin/AP.

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On Jan. 27, 1951, a U.S. B-50 bomber dropped a nuclear warhead over the Nevada desert.

"A fantastically bright cloud is climbing upward like a huge umbrella," said John Kerrigan of The Washington Bulletin.

The bomb, codenamed Able, detonated about a thousand feet above the ground, illuminating the early morning sky.

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