National Museum of Nuclear Science & History
William Schafer was a staff worker at Los Alamos during the Manhattan Project.
Durfee worked for Stone and Webster Engineering Corporation.
Dr. Karl Larsen worked at Massachusetts Institute of Technology during the Manahattan Project. While there, he conducted heavy-water research by spectrum analysis, which was one of the prerequisites to the early atomic bombs.
Ellis Ryan was a staff worker at Los Alamos during the Manhattan Project.