Politics

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U.S. Vice President Joseph R. Biden, left, gestures at photographers as British Prime Minister David Cameron, behind, bids him farewell after their meeting at 10 Downing St. in London, Tuesday, Feb. 5, 2013. Biden met with Cameron on Tuesday and attended a meeting of the U.K. National Security Council on the final leg of his European trip. (AP Photo/Matt Dunham)

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** FILE ** In this Jan. 28, 2013, file photo, Sen. Robert Menendez, D-N.J., speaks on Capitol Hill in Washington. Menendez's office says he traveled on a plane owned by a Florida physician who is a friend and political donor, but denied that the senator had engaged with prostitutes in the Dominican Republic. (AP Photo/J. Scott Applewhite, File)

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** FILE ** In this Sunday, April 19, 2009, photo, former Tehran prosecutor Saeed Mortazavi, gestures, during a news conference, in Tehran, Iran. Mortazavi, a close ally of President Mahmoud Ahmadinejad, has been arrested, two years after a parliamentary probe found him responsible for deaths by torture of at least three jailed anti-government protesters, state media reported. (AP Photo/Vahid Salemi)

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President Obama speaks Feb. 4, 2013, at the Minneapolis Police Department's Special Operations Center to outline his plan on gun violence. (Associated Press)

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President Obama shakes hands Feb. 4, 2013, with invited guests after he brought his gun-violence proposals on the road to the Minneapolis Police Department's Special Operations Center, where he outlined his plan before law enforcement personnel. (Associated Press)

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New Secretary of State John F. Kerry is greeted by State Department staff as he arrives during a ceremony welcoming him as the 68th secretary of state on Monday. He succeeds Hillary Rodham Clinton in the Cabinet post. (Associated Press)