William ‘Billy Jack’ Dieter (October 5, 1912 – April 18, 1942) was a sergeant in the United States Army Air Corps. Dieter was a bombardier on the Green Hornet, the sixth plane to take off from a US carrier as part of the Doolittle Raid, a bold long-range retaliatory air raid on the Japanese main islands, on April 18, 1942, four months after the attack on Pearl Harbor. The attack was a major morale booster for the United States. Dieter was one of only three airmen to die in the raid itself, when his B-25 Mitchell, 'Green Hornet', crashed on the coast of China, having run out of fuel.