Staff Sgt. Trevor Mandrigues, 22nd Maintenance Squadron aerospace maintenance craftsman, inspects the hydraulic line for cracks on a KC-135 Stratotanker, Feb. 1, 2016, at McConnell Air Force Base, Kan. Maintenance Airmen periodically inspect the aircraft against mechanical issues to guarantee the fleet is ready for aerial refueling mission at all times. (U.S. Air Force photo/Airman Jenna K. Caldwell)