National Museum of Nuclear Science & History
Pierce worked for Stone and Webster Engineering Corporation.
Greager worked at the 200 West Area at Hanford during the Manhattan Project.
Clarence Trammell was a staff worker at Los Alamos during the Manhattan Project.
Marshall Holloway was an American physicist. He received his PhD in physics from Cornell University. In 1942, he directed a secret Manhattan Project assignment at Purdue University.
William Gray worked for the Roane-Anderson Company.