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Senate Intelligence Committee Chairman Dianne Feinstein, D-Calif., answers questions from reporters following a closed-door briefing by intelligence agencies on the Boston Marathon bombing, on Capitol Hill in Washington, Tuesday, April 23, 2013. (AP Photo/J. Scott Applewhite)

Associated Press
Senate Intelligence Committee Chairman Dianne Feinstein, D-Calif., answers questions from reporters following a closed-door briefing by intelligence agencies on the Boston Marathon bombing, on Capitol Hill in Washington, Tuesday, April 23, 2013. (AP Photo/J. Scott Applewhite)
Senate Intelligence Committee Chairman Dianne Feinstein, D-Calif., answers questions from reporters following a closed-door briefing by intelligence agencies on the Boston Marathon bombing, on Capitol Hill in Washington, Tuesday, April 23, 2013. (AP Photo/J. Scott Applewhite)
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