Rado, an 8-year-old German Shepherd military working dog, awaits further instruction from U.S. Navy Petty Officer 3rd Class Arthur Vaughan, Camp Lemonnier master-at-arms and military dog handler, at the Camp Lemonnier, Djibouti, post office, Sept. 13. The duo searched the post office for preplaced contraband during a detection training exercise designed to keep the military working dogs proficient in detection.