Staff Sgt. Derek Scrivener, 11th Security Support Squadron military working dog handler, holds the leash of MWD Lenox at Joint Base Andrews, Md., Dec. 8, 2016. MWD’s work as force multipliers, using their senses in low-visibility situations to acknowledge things a handler might not see. (U.S. Air Force photo by Senior Airman Mariah Haddenham)