National Museum of Nuclear Science & History
Don Simpson worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Helena Calloway was a laboratory assistant in the Chemistry Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Dunbar worked in the United States Engineer District Office.
Myrtle Claire Bachelder was an American chemist and Women’s Army Corps officer stationed in Los Alamos during the Manhattan Project.
