United States Army

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Chinese People's Liberation Army honor guard members wait to rehearse before a welcome ceremony for the visiting U.S. Army Chief of Staff Gen. Raymond Odierno at China's Ministry of Defense in Beijing, Friday, Feb. 21, 2014. (AP Photo/Alexander F. Yuan, Pool)

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U.S. Army Chief of Staff Gen. Raymond Odierno, second from right, and Gen. Wang Ning, right, deputy Chief Staff of the People's Liberation Army (PLA), salute as they review an honor guard at China's Ministry of Defense in Beijing, Friday, Feb. 21, 2014. The U.S. Army chief met with top Chinese generals in Beijing Friday amid regional tensions and efforts to build trust between the two nation's militaries. (AP Photo/Alexander F. Yuan, Pool)

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U.S. Army Chief of Staff Gen. Raymond Odierno, right, shakes hands with Chinese generals at China's Ministry of Defense in Beijing, Friday, Feb. 21, 2014. The U.S. Army chief met with top Chinese generals in Beijing Friday amid regional tensions and efforts to build trust between the two nation's militaries. (AP Photo/Alexander F. Yuan, Pool)

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U.S. Army Chief of Staff Gen. Raymond Odierno, left, and Gen. Wang Ning, right, deputy Chief Staff of the People's Liberation Army (PLA), talk during their meeting at China's Ministry of Defense in Beijing, Friday, Feb. 21, 2014. The U.S. Army chief met with top Chinese generals in Beijing Friday amid regional tensions and efforts to build trust between the two nation's militaries. (AP Photo/Alexander F. Yuan, Pool)

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U.S. Army Chief of Staff Gen. Raymond Odierno, left, and Gen. Wang Ning, right, deputy Chief Staff of the People's Liberation Army (PLA), salute as they review an honor guard at China's Ministry of Defense in Beijing, Friday, Feb. 21, 2014. The U.S. Army chief met with top Chinese generals in Beijing Friday amid regional tensions and efforts to build trust between the two nation's militaries. (AP Photo/Alexander F. Yuan, Pool)

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U.S. Army Chief of Staff Gen. Raymond Odierno, left, is saluted by Gen. Wang Ning, right, deputy Chief Staff of the People's Liberation Army (PLA), upon his arrival at China's Ministry of Defense in Beijing, Friday, Feb. 21, 2014. The U.S. Army chief met with top Chinese generals in Beijing Friday amid regional tensions and efforts to build trust between the two nation's militaries. (AP Photo/Alexander F. Yuan, Pool)

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U.S. Army Chief of Staff Gen. Raymond Odierno, front right and Gen. Wang Ning, front left, deputy Chief Staff of the People's Liberation Army (PLA), review an honor guard at China's Ministry of Defense in Beijing, Friday, Feb. 21, 2014. The U.S. Army chief met with top Chinese generals in Beijing Friday amid regional tensions and efforts to build trust between the two nation's militaries. (AP Photo/Alexander F. Yuan, Pool)

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U.S. Army Chief of Staff Gen. Raymond Odierno, left, and Gen. Wang Ning, deputy Chief Staff of the People's Liberation Army (PLA), salute as they review an honor guard at China's Ministry of Defense in Beijing, Friday, Feb. 21, 2014. The U.S. Army chief met with top Chinese generals in Beijing Friday amid regional tensions and efforts to build trust between the two nation's militaries. (AP Photo/Alexander F. Yuan, Pool)

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U.S. Army Rangers assigned to 2nd Battalion, 75th Ranger Regiment, fire at an enemy bunker during Task Force Training on Camp Roberts, Calif., Feb. 1, 2014. Rangers constantly train to maintain their tactical proficiency. (U.S. Army photo by Spc. Steven Hitchcock)

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This undated image provided by the U.S. Army shows Sgt. Bowe Bergdahl. Washington has held indirect talks with the Taliban over the possible transfer of five senior Taliban prisoners from Guantanamo Bay in exchange for a U.S. soldier captured in Afghanistan nearly five years ago, a senior Taliban official told The Associated Press. A U.S. official said the possibility of an exchange is under discussion but would not comment on whether any talks have yet occurred. (AP Photo/U.S. Army)