U.S. Air Force Airmen of the 205th Engineering Installation Squadron, Oklahoma City, line up pieces of the metal frame during construction of an AN/GPN-27 Airport Surveillance Radar System tower, May 26, 2016, at Camp Lemonnier, Djibouti. The new radar is a more permanent replacement for the short-term radar currently in operation. (U.S. Air Force photo by Staff Sgt. Tiffany DeNault)