George W. Powers

R. L. Helgeson

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

Alfred Nier

Alfred Nier (1911 – 1994) was an American physicist. Nier was a pioneer in the field of mass spectrometry.

Lloyd J. Reeder

Reeder served as a sergeant in the 393rd Bombardment Squadron. He was regularly assigned to the B-29 Top Secret.

Allen C. Hirtle