Conversation so far:
How did Paul Tibbets get started in the military?
Paul Tibbets qualified for the Aviation Cadet Training Program and he enlisted in the army at Fort Thomas, Kentucky. He was sent to Randolph Field in San Antonio, Texas.
How did Paul Tibbets like the Cadet Aviation Training Program?
During his training, Paul Tibbets showed himself to be an above-average pilot.
Did Paul Tibbets become a pilot?
Paul Tibbets was commissioned as a second lieutenant and received his pilot rating in 1938 at Kelly Field in San Antonio.

Question: What did he fly
Self-contained rewrite: What did Paul Tibbets fly?