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NSA Tried Tracking Movements With Phone Data, Chief Says

The National Security Agency ran tests using mobile-phone data to track Americans’ movements until determining the information lacked intelligence value, the agency’s director said.

The NSA tested samples of bulk location information on U.S. mobile phones in 2010 and 2011 to see whether the data format could be used in its computer systems, General Keith Alexander told the Senate Judiciary Committee during a hearing in Washington today.