National Museum of Nuclear Science & History
Clarence Grover Sproul worked as a machinist on the Manhattan Project in Los Alamos, NM from January through June 1945.
Lieutenant General Leslie Groves (1896-1970) was a United States Army Corps of Engineers officer and director of the Manhattan Project.
Walter Treibel was a member of the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.
J. O. Parks worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Ralph Carlisle Smith was born in 1910 in New York. He co-authored Project Y: The Los Alamos Story, with David Hawkins and Edith Truslow.