David McDonald

Ethaline H. Cortelyou

Ethaline Hartge Cortelyou was a junior chemist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

D. L. Williams

Arnold E. Sleipnes

Arnold E. Sleipnes served as a techical sergeant in the 393rd Bombardment Squadron. He was a member of the ground crew regularly assigned to the B-29 Top Secret.

Frederick G. Stroke

Frederick Stroke was a staff worker at Los Alamos during the Manhattan Project.