Staff Sgt. Zachary Boozel, 56th Security Forces Squadron military working dog handler, places DC’s retirement shadowbox on a wall, Feb. 20, 2020, at Luke Air Force Base, Ariz. There are multiple shadowboxes on the wall commemorating the service of all MWD’s that retire from Luke AFB. Military working dogs and their handlers are responsible for protecting personnel and assets on military installations and the surrounding community. (U.S. Air Force photo by Senior Airman Caroline Burnett)