R. G. McGill

Horace A. Reeves

Horace Reeves worked for the J.A. Jones Construction Company.

H. F. Koch

H. F. Koch worked for the Tennessee Eastman Corporation at the Y-12 Plant.

John B. Friedrich

Joseph H. Heartberg

Joseph H. Heartberg was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.