National Museum of Nuclear Science & History
H. A. Pritchard worked for the J.A. Jones Construction Company.
Valentin Padilla was a staff worker at Los Alamos during the Manhattan Project.
Edward F. “Ed” Hammel was an American chemist. Hammel had just completed his Ph.D. at Princeton University when he joined a Canadian heavy water project sponsored by the school in 1941.
C. Cannon was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
