Secretary of State Hillary Rodham Clinton and Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, were in Islamabad today (May 27, 2011). Aamir Qureshi /AFP/Getty Images hide caption

itoggle caption Aamir Qureshi /AFP/Getty Images

Pakistani military and police officials cordoned off a street in Abbottabad near the compound where Osama Bin Laden was found and killed. (May 8, 2011, file photo.) Asif Hassan /AFP/Getty Images hide caption

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Corporal Daniel Wheeler, Bravo Co. 1/5 Marines, walks through a waist high wheat field on a patrol in Sangin District near the Helmand River in southern Afghanistan earlier this month. David Gilkey /NPR hide caption

itoggle caption David Gilkey /NPR

An image from an undated video released by the Department of Defense on May 7, 2011. Videos of Osama bin Laden and other materials were seized during the raid on his compound in Pakistan, during which the al-Qaida leader was killed by U.S. commandos. AFP/Getty Images hide caption

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