National Museum of Nuclear Science & History
Clatworthy worked at the 200 West Area at Hanford during the Manhattan Project.
Felix Bloch was a Swiss physicist and the winner of the 1952 Nobel Prize. Bloch was born in 1905 in Zurich, Switzerland.
Louis Henry Hempelmann (1914-1993) was Director of the Health Group at the Los Alamos site of the Manhattan Project.