National Museum of Nuclear Science & History
Twohey worked for Stone and Webster Engineering Corporation.
Clark Royer worked for the United States Engineer District Office.
Louis Rosen (1918-2009) was an American physicist. A native New Yorker and the son of Polish immigrants, Rosen was personally selected to work on the Manhattan project in Los Alamos while a graduate student in physics at the Pennsylvania State University.
Norris W. Embrey was a laboratory assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Geiger worked in the United States Engineer District Office.
