United States Army

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A U.S. Army cultural support team member with the Combined Joint Special Operations Task Force scans the terrain while sitting in a Humvee in Sarobi district, Kabul province, Afghanistan, Dec. 6, 2013. Team members traveled to multiple villages in order to speak with women and children about issues within their community and to address their medical needs. (DoD photo by Spc. Sara Wakai, U.S. Army/Released)

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Former President George Bush gets a hug from his wife Barbara after he made a successful parachute jump at the U.S. Army Yuma Proving Ground outside of Yuma, Ariz., Tuesday, March 25, 1997. Bush, using a civilian sport parachute, descended from 12,500 feet with members of the U.S. Army Golden Knight parachute team. (AP Photo/Mike Nelson, Pool)

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In this Wednesday Aug. 19, 2009 photo, made available Saturday Aug 22, soldiers of the U.S. Army's Apache Company, 2nd Battalion 87th Infantry Regiment, part of the 3rd Combat Brigade 10th Mountain Division based out of Fort Drum, N.Y., evacuate a wounded soldier after their armored vehicle hit an improvised explosive device in the Tangi Valley of Afghanistan's Wardak Province. (AP Photo/David Goldman)

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** RETRANSMISSION FOR IMPROVED QUALITY OF AFDG101 ** Soldiers of the U.S. Army's Apache Company, 2nd Battalion 87th Infantry Regiment, part of the 3rd Combat Brigade 10th Mountain Division based out of Fort Drum, N.Y., evacuate a wounded soldier after their armored vehicle hit an improvised explosive device in the Tangi Valley of Afghanistan's Wardak Province Wednesday Aug.19, 2009. (AP Photo/David Goldman)

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During a medevac mission by the U.S. Army's Task Force Pegasus, Marines carry a wounded comrade to a waiting helicopter. In 2011, as U.S. troops peaked at 100,000, 419 Americans were killed. In 2012, as the troop count began to decrease, the death toll fell to 319, three times what it was in 2006-2007. (Associated Press photographs)