U.S. Army Sgt. Claribel Lopez Feliciano, 688th Rapid Port Opening Element transportation management coordinator, uses a Defense Advanced GPS Receiver to find the first of four geographical points during the land navigation portion of the 597th Transportation Brigade’s annual Best Warrior Competition. Before setting out to find their points, each Soldier used a map and coordinates to chart the location of each checkpoint. (U.S. Air Force photo by Airman 1st Class R. Alex Durbin/Released)