LAS VEGAS (KTNV) — Before Las Vegans were entertained by the erupting volcano of The Mirage, the pirate show at Treasure Island or the dancing fountains of the Bellagio, they had the mushroom clouds of the Nevada Test Site.

During the Cold War, more than 900 nuclear weapons were detonated at what's now known as the Nevada National Security Site — 100 of them above ground.

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The telltale mushroom clouds were visible from downtown Las Vegas.

But explosive testing in the United States stopped in 1992, about four years before the U.S, signed (but never ratified) the Comprehensive Test Ban Treaty. Russia stopped its tests in 1990, and China in 1996.

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