National Museum of Nuclear Science & History
Daniel Mullane worked in Los Alamos from 1943 to 1945 as a technician. He helped develop a source holder for the uranium gun-type bomb before moving back to Detroit after the war.
Ryan worked at the 100-B Area at Hanford during the Manhattan Project.
R.J. Stepheson was a consultant at the Metallurgical Laboratory in Chicago during the Manhattan Project.
