What was the training for the crew of the enola gay?

Answer 1

The Enola Gay crew (Hiroshima) and the Bock's Car crew (Nagasaki) were members of the 509th Composite Group, a unit specially trained for the atomic bombing missions. Hand-picked from the best aircrews being trained in the US in the mid-war period, the 509th crews underwent rigorous training.

To accustom themselves to delivering the bulky atomic weapons of the era, they dropped concrete "pumpkin" practice bombs modeled after the actual bombs. Crews flew dozens of training missions in the US desert and in the Pacific theater practicing such drops.