M-1 Support Services contractors perform post-flight inspections on the first upgraded Sustainment Block-16 B-1 bomber at Ellsworth Air Force Base, S.D., May 2, 2016. This B-1 is the first of Ellsworth’s fleet to receive the upgrade which includes updating analog cockpit displays and connecting the aircraft to a global communications network. (U.S. Air Force photo by Airman Donald Knechtel/Released)