Borisz I, a 28th Security Forces Squadron military working dog, gnaws at Staff Sgt. Paul Gingras, a 28th SFS military working dog kennel master, during a demonstration at the 28th SFS K-9 facility on Ellsworth Air Force Base, S.D., May 16, 2019. The MWDs and their handlers are trained to provide narcotics and explosives detection keeping the base safe from threats. (U.S. Air Force photo by Airman 1st Class Christina Bennett)