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U.S. Army Spc. Mike Ballard stands with Apollo, his service dog, during an archery shooting session, Friday, May 17, 2012, in Puyallup, Wash. Ballard says his dog helps him get through the worst symptoms of the post-traumatic stress disorder that is a remnant of an explosion in Afghanistan that ended his career as an Army medic. (AP Photo/Ted S. Warren)

Military service dogs

Military service dogs are specially trained to help members of the armed forces deal with post traumatic stress disorder