Staff Sgt. Tyler Hendrix, left, and Tech. Sgt. Scott Heise, right, 11th Security Support Squadron military working dog handlers, train "Dixie" 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)