With the largest military working dog facility in the Air Force, the 11th Security Support Squadron trains 32 K-9s on controlled aggression techniques, building searches, bomb/drug detection and handler protection. (U.S. Air Force photo-illustration by Staff Sgt. Chad C. Strohmeyer)

Staff Sgt. Tyler Hendrix, 11th Security Support Squadron military working dog handler, trains "Dixi" on controlled aggression techniques at Joint Base Andrews, Md., July 29, 2015. Controlled aggression techniques are used to intimidate or "take down" a potential suspect. (U.S. Air Force photo by Staff Sgt. Chad C. Strohmeyer)(Released)

Tech. Sgt. Scott Heise, 11th Security Support Squadron military working dog handler, poses as a suspect while training a K-9 on controlled aggression techniques at Joint Base Andrews, Md., July 29, 2015. Military working dogs are trained to attack fleeing suspects, detect narcotics and explosives and conduct building searches. (U.S. Air Force photo by Staff Sgt. Chad C. Strohmeyer)(Released)

Staff Sgt. Tyler Hendrix, left, and Tech. Sgt. Scott Heise, right, 11th Security Support Squadron military working dog handlers, train "Dixi" on controlled aggression techniques at Joint Base Andrews, Md., July 29, 2015. Controlled aggression techniques are used to intimidate or "take down" a potential suspect. (U.S. Air Force photo by Staff Sgt. Chad C. Strohmeyer)(Released)

Dixi, 11th Security Support Squadron military working dog, watches a simulated suspect during controlled aggression training at Joint Base Andrews, Md., July 29, 2015. Controlled aggression techniques are used to intimidate or "take down" a potential suspect. (U.S. Air Force photo by Staff Sgt. Chad C. Strohmeyer)(Released)

Tech. Sgt. Scott Heise, 11th Security Support Squadron military working dog handler, trains "Dixi" on controlled aggression techniques at Joint Base Andrews, Md., July 29, 2015. Military working dogs can have careers ranging from 9 to 12 years. (U.S. Air Force photo by Staff Sgt. Chad C. Strohmeyer)(Released)

Dixi, 11th Security Support Squadron military working dog, takes a break from controlled aggression techniques at Joint Base Andrews, Md., July 29, 2015. Controlled aggression techniques are part of routine training for all K-9s to remain proficient and healthy. (U.S. Air Force photo by Staff Sgt. Chad C. Strohmeyer)(Released)