National Museum of Nuclear Science & History
Charles Helmers worked for the J.A. Jones Construction Company.
Robert L. McNamee served as a sergeant in the 393rd Bombardment Squadron. He was a member of the ground crew regularly assigned to the B-29 Bockscar.
Melvin A. Miller was a draftsman at the University of Chicago Met Lab. In 1946, he sketched two famous drawings of Chicago Pile-1 based on the descriptions of scientists who were present when it went critical.
