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Sen. John Kerry, D-Mass., emerges after a unanimous vote by the Senate Foreign Relations Committee approving him to become America's next top diplomat, replacing Secretary of State Hillary Rodham Clinton, on Capitol Hill in Washington, Tuesday, Jan. 29, 2013. Kerry, who has served on the Foreign Relations panel for 28 years and led the committee for the past four, is expected to be swiftly confirmed by the whole Senate later Tuesday. (AP Photo/J. Scott Applewhite)

Sen. John Kerry, D-Mass., emerges after a unanimous vote by the Senate Foreign Relations Committee approving him to become America's next top diplomat, replacing Secretary of State Hillary Rodham Clinton, on Capitol Hill in Washington, Tuesday, Jan. 29, 2013. Kerry, who has served on the Foreign Relations panel for 28 years and led the committee for the past four, is expected to be swiftly confirmed by the whole Senate later Tuesday. (AP Photo/J. Scott Applewhite)

Secretary of State John Kerry

U.S. Secretary of State John Kerry embarked on talks March 25 with Afghan

President Hamid Karzai.