Secretary of State Hillary Clinton is welcomed by Yemen's foreign minister, Abu Bakr al-Qurbi, at Sanaa airport upon her arrival earlier today (Jan. 11, 2011). Gamal Noman/AFP/Getty Images hide caption

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President Obama listens as Secretary of State Hillary Rodham Clinton speaks at the State Department in Washington on Dec. 13, 2010. Jewel Samad/AFP/Getty Images hide caption

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L-R: Defense Secretary Robert Gates, Vice President Biden, President Obama, Secretary of State Hillary Rodham Clinton, and Joint Chiefs Vice Chairman Gen. James Cartwright, during today's briefing. Pablo Martinez Monsivais/AP hide caption

itoggle caption Pablo Martinez Monsivais/AP

Former Massachusetts Gov. Mitt Romney speaks to the Values Voter Summit, held by the Family Research Council Action, Friday, Sept. 17, 2010, in Washington.  Jacquelyn Martin/Associated Press hide caption

itoggle caption Jacquelyn Martin/Associated Press