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National Museum of Nuclear Science & History

Donald S. Dreesen

Special Engineer DetachmentLos Alamos, NM

Manhattan Project VeteranMilitary VeteranSpecial Engineer Detachment

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Harry J. Mullett

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Herbert M. Parker

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Herbert M. Parker (1910-1984) was a British-American medical physicist. He worked at Chicago, Oak Ridge, and Hanford during the Manhattan Project, and is perhaps best known for inventing the rep (a precursor of the rad) and helping develop the rem to measure radiation dosage.

Merrill Garrett

Y-12 Plant

Merrill Garrett worked at the Y-12 Plant at Oak Ridge, TN during the Manhattan Project. A high school football star, Garrett received an appointment to the United States Military Academy, but was forced to decline due to financial circumstances during the Great Depression.