National Museum of Nuclear Science & History
Eugene Edwards worked for the Roane-Anderson Company.
Normand Brown worked for the Tennessee Eastman Corporation at the Y-12 Plant.
George Placzek was a Czech physicist. He was born in Brno, Moravia, which was then part of Austria-Hungary but today is in the Czech Republic.
Raymond Lowrey worked at the Hanford, Washington site for the Manhattan Project from 1943 to 1948. Lowrey began his career in the Oklahoma Ordnance Works before moving to Hanford and settling in Richland, Washington after the war.