Sgt. Bowe Bergdahl faced a preliminary hearing in San Antonio last week. He faces a possible court-martial for walking off his base in Afghanistan in 2009. An Army investigation produced a wealth of new information on his motivations. The major general who led the inquiry recommended against a prison sentence. AP hide caption

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AK, in a tan T-shirt on the left, his face blurred for his protection, was an Afghan interpreter who worked for the U.S. military. He poses with Afghan commandos in front of a controlled explosion. AK worked closely with American Jonathan Schmidt, in the dark tan shirt and a baseball cap (in the center). AK was with Schmidt when he was killed in a 2012 firefight. AK is now seeking a U.S. visa. Courtesy of Phil Schmidt hide caption

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Capt. Nathan McHone was killed in Afghanistan at age 29. Courtesy of the McHone family hide caption

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Defense Secretary Robert Gates and President Obama salute during a farewell ceremony for Gates on June 30, 2011. Evan Vucci/AP hide caption

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U.S. soldiers carry a comrade injured by an improvised explosive device, or IED, in Logar province, south of Kabul, on Oct. 13. Roadside bombs are one of the biggest threats facing U.S. and Afghan troops, and insurgents keeping finding inventive ways to disguise them. Munir Uz Zaman/AFP/Getty Images hide caption

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