National Museum of Nuclear Science & History
Frank Oppenheimer (1912-1985) was an American particle physicist. In 1941, Oppenheimer began work at the University of California Radiation Laboratory, where he was a group leader in uranium isotope separation under Ernest Lawrence.
H. M. Nappen worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Louis Spector worked for the United States Engineer District Office.
