National Museum of Nuclear Science & History
Hannibal Fraga was an engineer. He joined the Manhattan Project in the fall of 1944. He worked in the inspection department at Los Alamos.
R. H. Ball worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Johnston worked at the 300 Area at Hanford during the Manhattan Project.
P. D. Simpson worked for the Poe Piping & Heating Company.
