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.
Robert Schrader was completing his PhD in chemical engineering at MIT when he was selected to work on the Manhattan Project in Boston.
Hood worked at the 200 West Area at Hanford during the Manhattan Project.