National Museum of Nuclear Science & History
P. D. Simpson worked for the Poe Piping & Heating Company.
William C. “Bill” Elmore was an American experimental physicist who served as the chairman of the Physics department at Swarthmore College from 1948 to 1968.
Hollis worked for Stone and Webster Engineering Corporation.
R. B. Smith worked for Clinton Laboratories at the X-10 Reactor.