Portrait of four of the twelve members of the crew of the B-29 bomber Enola Gay, 1945. Pictured are, from left, Major Thomas Ferebee (1918 - 2000), Colonel Paul Tibbets (1915 - 2007), Captain Theodore Van Kirk, and Captain Robert A. Lewis (1917 – 1983). On August 6, 1945, the Enola Gay was used to drop the first of two atomic bombs on Japan in World War II. (Photo by PhotoQuest/Getty Images)