National Museum of Nuclear Science & History
Joseph Pappalardo was a staff worker at Los Alamos during the Manhattan Project.
H. M. Metcalf worked for the Tennessee Eastman Corporation at the Y-12 Plant.
E.J. Reagan joined Mound Laboratory in August 1948, where he worked as a doctor. He was responsible for monitoring the health and safety of Mound's employees, and he remained there until he retired in 1988.
Arthur Compton (1892-1962) was an American physicist and winner of the Nobel Prize in Physics. A top administrator and advisor during the Manhattan Project, Compton played a key role in the making of the atomic bomb.