Major Thomas Ferebee the Bombardier.

He was responsible for operation of the Norden bombsight. After setting the bombsight up and locating the Aim Point in its crosshairs he requested Colonel Paul Tibbets the Commander and Pilot to transfer control of the plane to the bombsight. Once he verified that the Norden bombsight was properly controlling the plane Ferebee flipped the Autorelease switch on the bombsight to allow the bombsight to do the drop automatically without further attention. After that he had nothing more to do until a second or so after the bomb dropped, when he flipped a switch on the bombsight returning control of the plane back to Tibbets.