Secretary of State Hillary Rodham Clinton and Defense Secretary Leon Panetta share 

Secretary of State Hillary Rodham Clinton and Defense Secretary Leon Panetta share a laugh during an event at the National Defense University in Washington, Tuesday, Aug. 16, 2011. (AP Photo/Susan Walsh)
Associated Press
Secretary of State Hillary Rodham Clinton and Defense Secretary Leon Panetta share a laugh during an event at the National Defense University in Washington, Tuesday, Aug. 16, 2011. (AP Photo/Susan Walsh)
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