National Museum of Nuclear Science & History
Geer worked at the 100-D Area at Hanford during the Manhattan Project.
Louise Richter was a staff worker at Los Alamos during the Manhattan Project.
Harry Sadler worked for the A. S. Schulman Electric Company.
Roscoe Charles Wilson was a United States Army Air Forces Officer. At the rank of Colonel he was the overall Project Office to the Manhattan Engineering District from June 1943 to December 1944.