National Museum of Nuclear Science & History
Pettengill served in the 393rd Bombardment Squadron.
James H. Coon was an American physicist. He worked on the Manhattan Project at the University of Chicago’s Metallurgical Laboratory and at Los Alamos.
Louis Bernard Werner was an American chemist. Werner received a B.S. from the University of Idaho, and was working on his doctorate at the Univeristy of Chicago at Berkeley when he was recruited to work on the Manhattan Project at the Chicago Met Lab.