Staff Sgt. Walter Rueda-Perez, 31st Aircraft Maintenance Squadron dedicated crew chief, loosens a bolt on a fuel tank, Aug. 24, 2016 at Aviano Air Base, Italy. The maintenance team swapped fuel tanks on several F-16 Fighting Falcons to meet maintenance standards and ensure mission readiness. (U.S. Air Force photo by Airman 1st Class Cary Smith/Released)