National Museum of Nuclear Science & History
Smith worked at the 200 Area at Hanford during the Manhattan Project.
Cartmell worked at the 300 Area at Hanford during the Manhattan Project.
Sherwood Johnston worked for the Roane-Anderson Company.
Elwin Covey was an assistant and protégé to Glenn Seaborg, and spent most of his time with the Manhattan Project at the X-10 plant in Oak Ridge, Tennessee.