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NSA: ‘Over 50′ Terror Plots Foiled by Data Dragnets

The director of the National Security Administration today told Congress that more than 50 potential terrorist attacks have been thwarted by two controversial programs tracking more than a billion phone calls and vast swaths of Internet data each day.

The attacks on would-be targets such as the New York Stock Exchange were prevented by caching telephone metadata and Internet information, including from millions of Americans since Sept. 11, 2001, Gen. Keith Alexander said during a hearing at the House Permanent Select Committee on Intelligence.

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