National Museum of Nuclear Science & History
Clarence Signaigo was a laboratory helper at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Jerome Karle (1918-2013) was an American chemist and Nobel laureate. During the war, Jerome Karle and his wife, Isabella Karle, worked on the Manhattan Project at the University of Chicago.
Jim Johnson was an ordnanceman at Los Alamos from 1944 to 1945. He was born on January 8, 1926, and started work at the Naval Ordnance Test Station at China Lake, Califiornia in 1944.
