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Gen. Keith B. Alexander, director of the National Security Agency and head of the U.S. Cyber Command, testifies on Capitol Hill in Washington on June 18, 2013, before the House Permanent Select Committee on Intelligence. (Associated Press)
Photo by: J. Scott Applewhite
Gen. Keith B. Alexander, director of the National Security Agency and head of the U.S. Cyber Command, testifies on Capitol Hill in Washington on June 18, 2013, before the House Permanent Select Committee on Intelligence. (Associated Press)

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