National Museum of Nuclear Science & History
William Thomas was a staff worker at Los Alamos during the Manhattan Project.
Ella "Jo" Littleton Baskette worked on the Manhattan Project in Oak Ridge, Tennessee at the Y-12 Plant.
Harry Allen worked in procurement and supply for Los Alamos during the Manhattan Project. He was also involved in organizing preparations for the Trinity Test.
Nielsen worked at the 300 Area at Hanford during the Manhattan Project.
John M. Sprecher was a chemical engineer. During the Manhattan Project, he worked for DuPont in Wilmington, DE.