A veteran of the Iraq War with post-traumatic stress disorder talks to physical therapist Nicole Bormann before a session in the VA Medical Center in St. Louis. Chris Hondros/Getty Images hide caption

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Brothers Deven (left) and Erik Schei ride by President Barack Obama on the South Lawn of the White House as part of the sixth annual Wounded Warrior Project's Soldier Ride on Friday. Saul Loeb/AFP/Getty Images hide caption

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Afghan Army soldiers stand during a security transition ceremony in Mazar-e-Sharif, north of Kabul, Afghanistan, on July 23, 2011. The Afghan government officially took control of security in the capital of the peaceful northern province of Balkh on July 23, as part of an effort to begin handing over all security responsibilities to Afghan forces by 2014. S. Sabawoon/AP hide caption

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Secretary of Defense Leon E. Panetta, far right, escorts Afghanistan's Minister of National Defense Abdul Rahim Wardak (center) and Minister of Interior Gen. Bismillah Khan Mohammadi (left) in the Pentagon. Erin A. Kirk-Cuomo/OASD/PA hide caption

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A portrait of Spc. Jonathan Nestico, 27, is displayed in his family's home in Woburn, Mass. Becky Lettenberger/Becky Lettenberger/NPR hide caption

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Pakistani security personnel stand guard outside the house in Islamabad where family members of al-Qaida chief Osama bin Laden are being held. Aamir Qureshi /AFP/Getty Images hide caption

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