U.S. Army Sgt. Michael McMillan, 1st Space Company engagement control team leader, holds a topographic map at Misawa Air Base, Japan, Oct. 18, 2017. Topographic maps are detailed, accurate graphic representations of features that appear on the Earth's surface and are were used during McMillan's annual land navigation training. (U.S. Air Force photo by Senior Airman Brittany A. Chase)