National Museum of Nuclear Science & History
Richard McNamara served as a 2nd lieutenant in the 393rd Bombardment Squadron of the 509th Composite Group.
Arthur Harold Jaffey was an associate chemist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Hayes worked in the United States Engineer District Office.
Thomas S. Grennan served as a 2nd lieutenant in the 393rd Bombardment Squadron.
