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National Museum of Nuclear Science & History

S.L. Nelson

Project StaffResearch & Development/300 Area

Hanford, WA
Manhattan Project VeteranProject Worker/Staff
The 300 Area at Hanford, WA today

Nelson worked at the 300 Area at Hanford during the Manhattan Project.

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Seckendorff worked for Stone and Webster Engineering Corporation.

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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.

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Irving worked at the 300 Area at Hanford during the Manhattan Project.

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