In 1955, British spy Kim Philby denied working for the Soviet Union. Eight years later, he defected to Moscow. He went on to speak to Stasi agents in East German, in an event that was captured on film. Harold Clements/Getty Images hide caption

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Harold Clements/Getty Images

Kim Philby Speaking In 1981

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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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Hans Punz/AP