National Museum of Nuclear Science & History
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.
Jessen worked at the 300 Area at Hanford during the Manhattan Project.
J. P. Marus worked for the J.A. Jones Construction Company.
