The U.S. military accidentally dropped 14 nuclear bombs—yes, you read that right! Operation Chrome Dome was meant to keep America safe during the Cold War, but instead, it led to some of the most ...

The U.S. hasn't tested a nuclear weapon in decades, and since the 1990s has used simulations and experiments to verify they're working properly. NPR was granted a rare look at how they do it.

A thousand feet beneath the desert, the United States conducts experiments to verify that its weapons work. But some fear a live test could come soon.