In the 1960s, the CIA lost a plutonium-fueled generator on top of a mountain in India. The generator was supposed to power an unmanned listening station, intended to pick up signals from China’s missile tests. But when mountaineers ascended the near 26,000-ft Nanda Devi – under the guise of studying the environment – weather got in their way. They left the nuclear device behind and months later, when they returned, it was gone. New York Times reporter Jeffrey Gettleman reconstructed this event with a team of journalists. The story took about seven years, thousands of miles, and earning the trust of many men who had grown old and have since passed away.

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This show is brought to you by N2K Networks, Goat Rodeo, and the International Spy Museum in Washington, DC. This episode was produced by Flora Warshaw and the team at Goat Rodeo. At the International Spy Museum, Mike Mincey and Memphis Vaughan III are our video editors. Emily Rens is our graphic designer. Joshua Troemel runs our SPY social media. Amanda Ohlke is our Director of Adult Education and Mira Cohen is the Vice President of Programs.