National Museum of Nuclear Science & History
Luzell Johnson left a factory job in Alabama for a much higher-paying one as a cement finisher at Hanford.
Seymour Calvert served for 11 months in the Special Engineering Detachment at Los Alamos. He specialized as a chemical engineer, and carried out experiments with beryllium that were often dangerous.
Jas McCarthy worked for the Kellex Corporation at the K-25 Plant.
Alfred Neyens served in the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.
