National Museum of Nuclear Science & History
Poindexter worked in the 200 West Area at Hanford during the Manhattan Project.
Walter R. Julek was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Luis Romero was a staff worker at Los Alamos during the Manhattan Project.
Warren Sheehan joined Mound Laboratory in April 1956. He spent the first half of his career in health physics, or radiation safety, where he developed a new methodology for determining the amount of plutonium in urine.