Secretary of State Hillary Clinton speaks during a news conference after a meeting on Libya in London Tuesday. World powers agreed that Moammar Gadhafi should step down after 42 years as Libya's ruler but did not discuss arming the rebels who seek to oust him. Toby Melville/AP hide caption

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Secretary of State Hillary Clinton (right) talks with Susan Rice, the U.S. ambassador to the United Nations, in September. The two played a critical role in winning U.N. authorization of using "all means necessary" to protect civilians in Libya. Stan Honda/AFP/Getty Images hide caption

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Secretary of State Hillary Clinton, shown on Capitol Hill on Thursday, is heading to Egypt and Tunisia as the U.S. tries to stay on top of what's happening in the Arab world. Jonathan Ernst/Getty Images hide caption

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Navi Pillay, the United Nations' high commissioner for human rights, looks on during a Human Rights Council special session on the crisis in Libya on Friday in Geneva. Pillay said the world must "step in vigorously" to protect Libyan protesters. Fabrice Coffrini/AFP/Getty Images hide caption

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