National Museum of Nuclear Science & History
Ralph Gates (1925-2018) was a chemical and electrical engineer who was recruited to the Manhattan Project as a part of the Special Engineer Detachment in early 1945.
C. E. Johnson worked for the Tennessee Eastman Corporation at the Y-12 Plant.
E. S. Bettis worked for the Tennessee Eastman Corporation at the Y-12 Plant.
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.