National Museum of Nuclear Science & History
Chemist Orville Hill joined the Met Lab at the University of Chicago in May of 1942, three months after it was created.
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.
George Maronde was a security guard at the University of Chicago Metallurgical Lab. He stood guard outside Stagg Field when Chicago Pile-1 went critical on December 2, 1942.
