National Museum of Nuclear Science & History
H. R. Grady worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Roger Rasmussen was an electrical engineer and member of the Special Engineer Detachment at Los Alamos.
Opaline Calhoun was a laboratory technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Harris worked at the 300 Area at Hanford during the Manhattan Project.
