National Museum of Nuclear Science & History
Calvin B. Fowler served in the 1st Ordnance Squadron.
Dr. Karl Larsen worked at Massachusetts Institute of Technology during the Manahattan Project. While there, he conducted heavy-water research by spectrum analysis, which was one of the prerequisites to the early atomic bombs.
Henry McDonald, Jr. worked for the United States Engineer District Office.
Arthur Harold Jaffey was an associate chemist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
