Robert A. Lewis was the co-pilot of which first aircraft to drop an atomic bomb?
Robert A. Lewis:  He was the co-pilot of the "Enola Gay", the B-29 Superfortress bomber which dropped the atomic bomb Little Boy on the Japanese city of Hiroshima on 6 August 1945. Enola Gay:  On 6 August 1945, during the final stages of World War II, it became the first aircraft to drop an atomic bomb.
Enola Gay