Senior Airman John Weaver, 436th Maintenance Squadron crew chief, and Lt. Gen. Sam Cox, 18th Air Force commander, walk on a C-5M Super Galaxy’s wing during a tour of the 436th Maintenance Squadron’s Isochronal Maintenance Dock March 1, 2017, at Dover Air Force Base, Delaware. During an ISO inspection, aircraft maintainers strip down the C-5 looking for any deficiencies, faults, cracks or other problems in every system of the aircraft. (U.S. Air Force photo by Senior Airman Zachary Cacicia)