National Museum of Nuclear Science & History
Leo J. Czaja served in the 603rd Air Engineering Squadron.
John Crawford was a physicist and research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Twichell worked at 200 West Area at Hanford during the Manhattan Project.
Hartley Rowe was an American industrial engineer. Rowe worked on the Panama Canal; for Lockwood Greene, an engineering firm; and for the United Fruit Company, where he rose to become vice president.
Richard "Dick" Skancke was a security guard at Los Alamos during the Manhattan Project from late 1946 until late 1947.