Afghanistan's Chief Executive Officer Abdullah Abdullah (left) stands with President Ashraf Ghani, Vice President Joe Bidden, Defense Secretary Ash Carter and Maj. Gen. Jeffrey Buchanan at a wreath-laying ceremony at the Tomb of the Unknowns on Tuesday. Andrew Harnik/AP hide caption

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A cell block at the now-closed Abu Ghraib prison in Baghdad, a facility notorious for photos released in 2004 showing U.S. soldiers torturing and humiliating inmates. Karim Kadim/AP hide caption

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Heavy smoke rises following an airstrike by the U.S.-led coalition aircraft in Kobani, Syria, during fighting between Syrian Kurds and the militants of the self-declared Islamic State in October 2014. Gokhan Sahin/Getty Images hide caption

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Afghanistan's Shapoor Zadran celebrates as he leaves the field after guiding his team to victory against Scotland in the Pool A game of the Cricket World Cup in Dunedin, New Zealand, on Thursday. Dianne Manson/AP hide caption

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