National Museum of Nuclear Science & History
William J. Nicholson was born on March 2, 1924 in Chicago, Illinois. Growing up, he was interested in engineering, aviation, and aeronautics.
D. M. Ellett is a mechanical engineer who joined the Manhattan Project after the end of World War II.
Royden Johannesson worked for the United States Engineer District Office.
N. W. Kemper worked for the Tennessee Eastman Corporation at the Y-12 Plant.
