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Robert Philip Hansen thought he was smarter than the system. For decades, the quirky but respected counterintelligence expert, religious family man, and father of six, sold top secret information to agents of the Soviet Union and Russia. A self-taught computer expert, Hansen often encrypted his stolen files on wafer-thin disks. The data-some 6000 pages of highly classified documents-revealed precious nuclear secrets, outlined American espionage initiatives, and named names of agents-spies who covertly worked for both sides. Soviet government leaders, and their successors in the Russian Federation, used the stolen information to undermine U.S. policies and to eliminate spies in their own ranks. Moscow did not allow their moles the luxury of a defense: at least two men named by Hanssen were executed; a third languished for years in a Siberian hard labor camp.



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