Conversation so far:
what was the name of atomic bomb dropped on hiroshima?
Little Boy  was the atomic bomb dropped on Hiroshima
what kind of plane carried the atomic bomb Little Boy when dropped on Hiroshima?
A B-29 bomber plane carried the atomic bomb

Question: who was the pilot?
Self-contained rewrite: who was the pilot of the plane that carried the atomic bomb Little Boy that dropped on Hiroshima?