Secretary of State Hillary Clinton (in red) shook hands with a child as she visited Cairo's Tahrir Square earlier today (March 16, 2011). Paul J. Richards /AFP/Getty Images hide caption

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"We have an enormous stake in ensuring that Egypt and Tunisia provide models for the kind of democracy that we want to see," Secretary of State Hillary Clinton told a congressional panel. Jose Luis Magana/AP hide caption

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Feb. 4: Anti-government protesters held a sign referencing the Facebook social networking website that was important in organizing protesters in Tahrir Square. Chris Hondros/Getty Images hide caption

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Secretary of State Hillary Rodham Clinton, Monday (Feb. 14, 2011) on Capitol Hill. Jim Watson /AFP/Getty Images hide caption

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Egyptian antiquities graduates protested in front of the Supreme Council of Antiquities in Cairo today (Feb. 14, 2011). They were among many groups demanding jobs, higher pay or better working conditions. Khalil Hamra/AP hide caption

itoggle caption Khalil Hamra/AP