National Museum of Nuclear Science & History
W. A. Gracey worked for the Roane-Anderson Company.
M. A. Obermeyer worked for the J.A. Jones Construction Company.
Louis Martinelli worked for the United States Engineer District Office.
Helen Mulvihill was the commander officer of the Women’s Army Corps at Los Alamos during the Manhattan Project.
James C. Hart was a DuPont chemist and member of the health physics group during the Manhattan Project.
