National Museum of Nuclear Science & History
M. E. Gregson worked for the Roane-Anderson Company.
Evelyn “Evie” Wilcox was a machinist at Los Alamos during the Manhattan Project. Prior to joining, she worked on airplanes in California for the war effort.
O. R. "Big" Simpson was a second lieutenant in military intelligence in charge of convoys carrying plutonium from Hanford to Fort Douglas, Utah.