National Museum of Nuclear Science & History
Seymour worked at the 200 West Area at Hanford during the Manhattan Project.
Cronholm worked at the 100-F Area at Hanford during the Manhattan Project.
Daniel Pfaff was a staff worker at Los Alamos 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.
