U.S. Army Sgt. 1st Class Timothy Hartranft, 9th Expeditionary Bomb Squadron ground liaison officer, stands in front of the 9th EBS T-Wall at Al Udeid Air Base, Qatar, Feb. 6, 2019. The GLO translates the ground units’ intent into action in the air, also known as green to blue. All GLOs within the U.S. Central Command area of responsibility are supplied by the 4th Battlefield Coordination Detachment which is a unit under U.S. Army Central. (U.S. Air Force photo by Senior Airman Travis Beihl)