Air Force Tech. Sgt. Bryan Dell gets tackled by military working dog, Fay, during muzzle aggression training on Scott Air Force Base, Illinois, March 20, 2015. Dell is a military dog handler assigned to the 375th Security Forces Squadron NCOIC military working dog section. (U.S. Air Force photo by Senior Airman Tristin English)

More images of airmen training military working dogs on Scott Air Force Base in the slideshow below.