National Museum of Nuclear Science & History
Leo Wojtanowski worked in a shop at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
Halbrook worked in the United States Engineer District Office.
Knight worked in the 200 West Area at Hanford during the Manhattan Project.
Frank E. Keene was a janitor at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.