Captain Elizabeth Jackson of the U.S. 3rd Battalion teeters with an Afghan boy on a playground in southern Afghanistan. Peter Parks /AFP/Getty Images hide caption

itoggle caption Peter Parks /AFP/Getty Images

Afghanistan President Hamid Karzai attends the inauguration of the Afghan academic year in Kabul on March 23. Musadeq Sadeq/AP hide caption

itoggle caption Musadeq Sadeq/AP

Lt. Col. Brian Filler (left) and Tech. Sgt. John Oliver watch over the Galuch Valley from the top of a mountain in Laghman province in eastern Afghanistan on March 27. They are part of a team of Joint Terminal Attack Controllers for the U.S. Air Force, traveling on the ground with combat troops and coordinating with aircraft to reduce the likelihood of airstrike errors. Quil Lawrence/NPR hide caption

itoggle caption Quil Lawrence/NPR

Afghan National Army soldiers line up with their literacy instruction materials in hand Aug. 7, 2010, at the Capital Division Headquarters. Staff Sgt. Rachel Martinez/USAF via Flickr hide caption

itoggle caption Staff Sgt. Rachel Martinez/USAF via Flickr

Children stand on the ruined wall of a house in a hamlet in Lower Khasro, Arghandab. Quil Lawrence/NPR hide caption

itoggle caption Quil Lawrence/NPR

A special tribunal set up by Afghan President Hamid Karzai has urged the president to delay the opening of Afghanistan's parliament, four months after the country's disputed elections. Majid Saeedi/Getty Images hide caption

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An Afghan boy pushes a wheelbarrow past oil tankers parked up near the Afghan-Iran border at Islam Qala on the outskirts of Herat, west of Kabul, Jan. 4. Reza Shirmohammadi/AP hide caption

itoggle caption Reza Shirmohammadi/AP

U.S. Army Capt. Aaron T. Schwengler (second left) and other U.S. soldiers of the 3rd Battalion, 187 Infantry, B Company talk with Afghan villagers during a patrol in Bangi village, Andar district in Ghazni province, Jan. 6. Shah Marai/AFP/Getty Images hide caption

itoggle caption Shah Marai/AFP/Getty Images