National Museum of Nuclear Science & History
Frei worked for Stone and Webster Engineering Corporation.
Waldemar Nielsen (1917-2005) worked on the postwar surveys of Hiroshima and Nagasaki in Japan. Nielsen was born in Greensburg, Pennsylvania.
Stanley Rentschler served in the 1395th Military Police Aviation.
Sanford McDonnell was a mechanical engineer with the Special Engineering Detachment at Los Alamos from April 1944 to April 1946.
