 The Joseph Priestley House remains standing, as a museum.World War II Major General Uzal Girard Ent, who had led the August 1943, raid on the Romanian oil refineries in Ploiești, chose Colonel Paul Tibbets to lead the 509th Composite Group, asking him to organize and lead a combat force to deliver a new type of explosive device that is so powerful that its full potential was unknown.Tibbets did so, and was the commander and pilot of the Enola Gay, the plane that delivered the first atomic bomb (Little Boy) on Hiroshima, Japan, on August 6, 1945.