National Museum of Nuclear Science & History
A. D. Lawrence worked for the Roane-Anderson Company.
Bowen was at Los Alamos during the Manhattan Project.
Theodore Perlman was an American engineer working at the Los Alamos laboratory during the Manhattan Project.
Gus Essig began working on the Manhattan Project in May, 1946 in Dayton, Ohio. Essig was selected to work in the highly classified initiator program and spent several months at Los Alamos learning how to design and construct initiators.