FILE - In this Sept. 23, 2010, file photo Army Gen. Keith B. Alexander, then-commander of the U.S. Cyber Command, center right, arrives at a Capitol Hill committee hearing in Washington to testify about cyberspace operations. Alexander now directs the National Security Agency, whose job it is to use the world's most cutting edge supercomputers and arguably the largest database storage sites to crunch and sift through terabytes of data, whether it was stolen from a foreign official's laptop by a CIA officer overseas, or intercepted by a Navy spy plane flying off the Chinese coast, or, as Americans found out this week, secreted from your personal phone records. (AP Photo/Manuel Balce Ceneta, File)
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