National Museum of Nuclear Science & History
Waldemar Nielsen (1917-2005) worked on the postwar surveys of Hiroshima and Nagasaki in Japan. Nielsen was born in Greensburg, Pennsylvania.
Daniel J. Keefe was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
George Royster was a civilian physicist working at the X-10 graphite reactor in Oak Ridge, Tennessee.
