More than twenty Army Air Forces airmen, representing multiple B-29 Superfortress bomber crews, gather for a formal group portrait beside their aircraft, tail number 3643, marked with the squadron code 'EL.' Photographs like this commemorated key milestones - the completion of training, crew assignment, or preparation for overseas deployment - for the young men who would fly and maintain America's newest heavy bomber during the closing years of World War II. Project: 218411