National Museum of Nuclear Science & History
D. G. Graham worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Kenneth Greisen was an American physicist. He worked on the Manhattan Project at Los Alamos. He was the leader of Group X-1A (Photogoraphy with Flash X-Rays) until it was dissolved in May 1945.
Joseph was a staff member at Los Alamos during the Manhattan Project.
Smith worked at the 100-B Area at Hanford during the Manhattan Project.