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National Museum of Nuclear Science & History

Raymond Greenhalgh

Project WorkerOak Ridge, TN

Manhattan Project VeteranProject Worker/Staff
The Chapel on the Hill in Oak Ridge

Greenhalgh worked in the United States Engineer District Office.

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James S. Harmon

Oak Ridge, TN

Harmon worked in the United States Engineer District Office.

Gilbert Plass

Chicago, IL

Gilbert Plass was a Canadian physicist. Plass was born in 1922 in Toronto. He received a B.S. in physics from Harvard University before being hired to work on the Manhattan Project at the Chicago Met Lab, where he worked as an associate physicist.

Nelmar J. Rigstad

X-10 Graphite Reactor

Attended Washington State University.

Donald L. Sheets

Tinian Island

Donald L. Sheets served in the 603rd Air Engineering Squadron.