A tourist at the Bradbury Science Museum in Los Alamos, New Mexico, in February examines a full-size replica of the "Fat Man" atomic bomb which was dropped on Nagasaki, Japan, on Aug. 9, 1945. Los Alamos is home to the Los Alamos National Laboratory which was established in 1943 as part of the Manhattan Project. Robert Alexander/Getty Images hide caption

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Nancy Reagan (left) and Soviet first lady Raisa Gorbachev both smile politely during a tension-filled tea in Geneva in 1985, while their husbands discussed nuclear disarmament. Dieter Endlicher/AP hide caption

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Young South Koreans in the Hongdae neighborhood of Seoul, the weekend following North Korea's latest announcement of a nuclear test. Haeryun Kang/for NPR hide caption

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For Young South Koreans, The North's Nuclear Test Is Barely A Blip

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The SS United States ocean liner, seen here docked in Philadelphia in 2013, was built in 1952 for United States Lines in an attempt to capture the trans-Atlantic speed record. Landov hide caption

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Willis Conover, an expert on jazz, broadcasts "Music USA" from his Voice of America studio in Washington in March 1959. AP hide caption

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Willis Conover, The Voice Of Jazz Behind The Iron Curtain

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Courtesy of Doubleday

From Blueprints To Betrayal: The Daring, And Downfall, Of A Cold War Spy

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German Chancellor Angela Merkel, left, and Mayor of Berlin Klaus Wowereit, 3rd from left, place candles to commemorate the victims of the Wall at the Berlin Wall memorial site at Bernauer Strasse in Berlin, Germany, on Sunday. Markus Schreiber/AP hide caption

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Swedish corvette HMS Stockholm patrols Jungfrufjarden in the Stockholm archipelago, Sweden, on Monday. Swedish authorities say they've detected "foreign underwater activity" thought to be a possible Russian submarine. Anders Wiklund/EPA/Landov hide caption

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An Oct. 28, 1985 photo of John A. Walker Jr., being escorted by a federal marshal as he leaves the Montgomery County Detention Center in Rockville, Md., enroute to a federal court in Baltimore. He was ultimately sentenced to life in prison on espionage charges. Bob Daugherty/AP hide caption

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The villa that allegedly belongs to the NSA in Vienna. News outlets, the government and opposition parties are battling it out over allegations that the stately villa in a leafy Vienna district served as a sophisticated a U.S. intelligence listening post keeping tabs on most of Vienna. Hans Punz/AP hide caption

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