Today in 1929, James Harold Doolittle completed the first aviation flight using only an aircraft’s instrumentation. The aircraft he flew in had no windows, granting him no vision outside of the cockpit. Doolittle was the first person to theorize that an aircraft could be flown through low-vision situations if a pilot learned to trust their instruments over their senses. Shortly after, Doolittle helped develop the artificial horizon and directional gyroscope, both of which are now standard aviation equipment.