U.S. Air Force Senior Airman Erik Barrera, 52nd Security Forces Squadron military working dog handler, and Ccatilina, an MWD, conduct training at Spangdahlem Air Base, Germany, Aug. 1, 2019. MWDs regularly train to exercise obedience and controlled aggression. (U.S. Air Force photo by Airman 1st Class Valerie Seelye)

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Photo by: Airman 1st Class Valerie Seelye |  VIRIN: 190801-F-ON660-0686.JPG