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U.S. Air Force Staff Sgt. Trey Nelson, a 30th Security Forces Squadron military dog handler, poses with his military working dog, Axel, at Spangdahlem Air Base, Germany, Sept. 10, 2023. Axel retired from service as a military working dog, July 25, 2025, from the 52nd Security Forces Squadron, at Spangdahlem Air Base, Germany, after an impressive career spanning more than 60,000 working hours, including 50,000 hours dedicated to explosive detection. Nelson, Axel’s seventh handler, sees Axel’s retirement as not just a time for rest, but an opportunity for Axel to enjoy the peace he spent his career