Breston, a military working dog for the 375th Security Forces Squadron (SFS), attacks Staff Sgt. Bryan Dell, the 375 SFS kennel manager, during a demonstration at the 126th Air Refueling Wing facilities at Scott Air Force Base, Ill., April 28, 2014. K-9 units are a special section of the security forces that is inclusive to the military working dogs (Air National photo by Senior Airman Elise Stout).