National Museum of Nuclear Science & History
O'Brien worked for Stone and Webster Engineering Corporation.
Richard F. Cannon served as a corporal in the 393rd Bombardment Squadron. He was assigned as the radar operator in the Necessary Evil, but flew in the Big Stink in the 1945 bombing mission on Nagasaki.
Harry Stephon was a gruard and sergeant in the U.S. Army at the Metallurgical Laboratory in Chicago during the Manhattan Project.
