this for leggett warrior, back home after being on the front lines of the war on terror. >> you never know if he will remember it. >> he and his original handler were a team that few could match. >> they had a closer bond. them that they were deployed together in 2010. during a mission sergeant kramer stepped on an explosive device. >> ultimately, she gave her life. >> amazingly, the dog was not harmed physically, but was sent back to fort belvoir to be examined. >> things are different. >> it is hard on them just like people. the military experts say at least 5% of dogs to go through traumatic combat experiences end up timid like this. >> he wants to do his job but it is not going to work. and the troubling behavior is consistent with k9 posttraumatic stress disorder. watch as this dog shies away with his tail tucked and ears back. the best this german shepherd barks out uncontrolled be. each of these highly trained dogs developed ptsd after long- term exposure. some dogs take months to recover. others never bounce back. for jopa, coming home without charging kramer was not easy. >>