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National Museum of Nuclear Science & History

C. H. Greenwalt

Project Staff Research & Development/300 Area

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

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

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A.J. Sieck

B Reactor/100 Area

Sieck worked at the 200 East Area at Hanford during the Manhattan Project.

Harry Petcher

Hanford, WA

Harry Petcher's flat feet meant he couldn't be drafted, but still had an obligation to work for the war effort.

J. A. Douglas

Oak Ridge, TN

J. A. Douglas worked for the Roane-Anderson Company.

Truman P. Kohman

Chicago, IL

Truman P. Kohman (1916-2010) was an American chemist. Kohman worked on the Manhattan Project at the University of Chicago Metallurgical Laboratory and at Hanford, where he met his wife, Jane Sievers.