National Museum of Nuclear Science & History
H. J. Curtis worked for Clinton Laboratories at the X-10 Reactor.
Daniel D. Friel was a chemical engineer for the DuPont Company who joined the Manhattan Project at the University of Chicago in 1943.
Rupea worked at the 300 Area at Hanford during the Manhattan Project.
John Willard was a research associate at the Chicago Met Lab during the Manhattan Project.