National Museum of Nuclear Science & History
F. R. O'Brien worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Raycliffe C. Davis was a graduate of Central College in Pella, Iowa. He joined the Army while living in Cedar Rapids, IA, and was assigned with Special Engineering Detachment in Oak Ridge, TN in April 1944.
Joe M. Madrid served as a corporal in the 393rd Bombardment Squadron. He was a member of the ground crew regularly assigned to the B-29 Some Punkins.
Howard R. Kratz (1916-2013) was a nuclear physicist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Kathleen McClinton was a librarian at Oak Ridge, Tennessee. She was married to Manhattan Project scientist Leslie T.
