National Museum of Nuclear Science & History
C. L. McCallum worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Bob Emigh was in the Navy and worked with Deak Parsons on telemetry for the bombs. He was assigned as the science officer for the planned third bomb.
John Crawford was a physicist and research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
