U.S. Secretary of State Hillary Clinton looks on as Pakistani Foreign Minister Hina Rabbani Khar speaks at a joint news conference in Islamabad on Friday.

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Libyan leader Moammar Gadhafi, shown in a 2008 file photo, ruled Libya for 42 years. Libya's new leaders say he was killed Thursday in his hometown of Sirte.

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Pakistani security personnel stand alert on a street in Quetta in September. Proposed appropriations bills in both the U.S. House and Senate make economic and military assistance to Pakistan conditional. Banaras Khan/AFP/Getty Images hide caption

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Defense Secretary Leon Panetta looks on at left as Joint Chiefs Chairman Adm. Michael Mullen testifies Thursday in Washington. Harry Hamburg/AP hide caption

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U.S Treasury Secretary Timothy Geithner (left) speaks to French Finance Minister Francois Baroin (right) during talks in Marseille earlier this month. The U.S. is increasingly concerned that the European debt crisis will have an impact on the U.S. economy. Lionel Cironneau/AP hide caption

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