Politics

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** FILE ** Former Pakistani President Pervez Musharraf addresses his party supporters on April 15, 2013, at his house in Islamabad. (Associated Press)

This combo of photos released by the FBI early Friday April 19, 2013, shows what the FBI is calling Suspects No. 1, left, and No. 2, right, walking through the crowd in Boston on Monday, April 15, 2013, before the explosions at the Boston Marathon. (AP Photo/FBI)

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This photo released by the FBI early Friday April 19, 2013, shows what the FBI is calling Suspect No. 2, walking through the crowd in Boston on Monday, April 15, 2013, before the explosions at the Boston Marathon. (AP Photo/FBI)

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** FILE ** Homeland Security Secretary Janet Napolitano testifies on Capitol Hill in Washington, Thursday, April 18, 2013, before the House Homeland Security Committee. (AP Photo/Evan Vucci)

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"I want you all to combine your personal ideals with the 'dream to strengthen the military,'" Chinese President Xi Jinping said during a recent visit to a submarine and destroyer base. (Associated Press)

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Secretary of State John Kerry testifies on Capitol Hill in Washington on April 18, 2013, before the Senate Foreign Relations Committee hearing to examine national security and foreign policy priorities in the fiscal 2014 international affairs budget. (Associated Press)

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This image released by the FBI on Thursday, April 18, 2013, shows in a image from video what the FBI is calling suspect number 2, highlighted, with a white hat walking in Boston on Monday, April 15, 2013, before the explosions at the Boston Marathon. (AP Photo/FBI)

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This image released by the FBI on Thursday, April 18, 2013, shows in a image from video what the FBI is calling suspect number 2 with a white hat, highlighted, walking in Boston on Monday, April 15, 2013, before the explosions at the Boston Marathon. (AP Photo/FBI)

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This image released by the FBI on Thursday, April 18, 2013, shows in a image from video what the FBI is calling suspect number 2 with a white hat walking in Boston on Monday, April 15, 2013, before the explosions at the Boston Marathon. (AP Photo/FBI)

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This image released by the FBI on Thursday, April 18, 2013, shows in a image from video what the FBI is calling suspect number 1 with a black hat walking with a backpack in Boston on Monday, April 15, 2013, before the explosions at the Boston Marathon. (AP Photo/FBI)

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This image released by the FBI on Thursday, April 18, 2013, shows in a image from video what the FBI is calling suspect number 1 with a black hat walking with a backpack in Boston on Monday, April 15, 2013, before the explosions at the Boston Marathon. (AP Photo/FBI)