National Museum of Nuclear Science & History
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.
I. P. Grill served in the 390th Air Service Group.
Daniel N. Koshland was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
