U.S. Marines with 3D Marine Logistics Group, III Marine Expeditionary Force, conduct Military Operation Urban Terrain drills on Camp Hansen, Okinawa, Japan, May 11, 2017. The U.S. Army Engineering and Support Center, Huntsville is the designated the Range and Training Land Program Mandatory Center of Expertise and assists the Department of the Army and installations in planning, site development, programming and design of ranges.