National Museum of Nuclear Science & History
Paul Sperling was a staff worker at Los Alamos during the Manhattan Project.
Seymour worked at the 200 West Area at Hanford during the Manhattan Project.
Martha G. Johnson was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Sotero Romero was a staff worker at Los Alamos during the Manhattan Project.
