National Museum of Nuclear Science & History
J. M. Herndon worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Morris worked in the 300 Area at Hanford during the Manhattan Project.
F. R. O'Brien worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Major John A. Derry was a top military assistant, mainly working in Washington D.C., during the Manhattan Project.
Harry S. Truman (1884-1972) was the 33rd President of the United States of America. Truman first learned of the Manhattan Project after the death of President Roosevelt in April of 1945, when he relinquished his role as Vice President and took the oath of office as the next president of the United States.
