Tech Sgt. Kellie Peterson, a military working dog handler assigned to the 28th Security Forces Squadron, observes Senior Airman Emelina Braden, a MWD handler assigned to the 28th SFS, and Eelsen, a MWD assigned to the 28th SFS, during an explosive detection certification test at Ellsworth Air Force Base, S.D., Feb. 24, 2017. During the test, both Braden and Eelsen scope out a designated building searching for 10 different explosive aids hidden throughout to determine their capability and efficiency. (U.S. Air Force photo by Senior Airman Anania Tekurio)