National Museum of Nuclear Science & History
O’Black worked in the 200 East Area at Hanford during the Manhattan Project.
H. E. Wentworth worked for the Roane-Anderson Company.
Dahleen worked in the United States Engineer District Office.
Ralph D. Fry served in the 603rd Air Engineering Squadron.
Charles Maier was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
