4. What milestone did 1st Lieutenant James Harold Doolittle accomplish?

a. First successful blind flight

b. First successful non-stop flight across the US

C. First successful transatlantic flight

d. First person to solve the problem of special disorientation

1st Lt James Harold Doolittle made another milestone flight on 24 September 1929. His milestone was the first successful blind flight-the act of taking off and landing relying solely on instruments inside the cockpit for guidance. He took off, flew five miles, and landed safely-all without looking out of the plane.