Master-At-Arms 2nd Class Ian Stephenson, of Naval Air Facility (NAF) Atsugi Naval Security Force, introduces Military Working Dog (MWD) Rex to Shirley Lanham Elementary School students during a demonstration at the base's MWD Division. Some of the duties of a MWD and their handler on NAF Atsugi include internal and external base perimeter patrols, random inspections of bachelor and family housing and the occasional demonstration. (U.S. Navy photo by Personnel Specialist 3rd Class Vivian Blakely/Released)