F-35 test pilot Dan Levin, Pax River Integrated Test Force, flies an Auto Ground Collision Avoidance System (Auto-GCAS) test flight in an F-35C on a low level through West Virginia, June 17, 2019. Flying the low level helps stress the Auto-GCAS software to confirm there are no false collision warnings while flying as close to the ground as operationally representative. The F-35 Enterprise begins fielding Auto-GCAS on the F-35 fleet in 2019. US Navy photo