U.S. National Security Agency (NSA) Director General Keith Alexander uses a library card as an example while testifying before the Senate Judiciary Committee in Washington December 11, 2013. ... more 
U.S. National Security Agency (NSA) Director General Keith Alexander uses a library card as an example while testifying before the Senate Judiciary Committee in Washington December 11, 2013. REUTERS/Gary Cameron (UNITED STATES - Tags: POLITICS MILITARY) less 
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Reuters | Photo By GARY CAMERON / Reuters
Wed, Dec 11, 2013 3:44 PM EST