National Museum of Nuclear Science & History
Sidney Williams was a janitor at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
R. M. Thomas worked for the United States Engineer District Office.
Eugene S. Grennan served as a 2nd lieutenant in the 509th Composite Group. He was the flight engineer on the Straight Flush during the Hiroshima mission.
John von Neumann was a Hungarian-American mathematician, physicist, and polymath. A child prodigy, by the age of eight he was familiar with calculus and knew Ancient Greek.