National Museum of Nuclear Science & History
M. B. Dieson worked at the 300 Area at Hanford during the Manhattan Project.
Leon D. Smith joined the Manhattan Project in 1944 and was assigned to the 509th Composite Group at Wendover Airfield in Utah.
Willard G. Knox served in the 603rd Air Engineering Squadron.
H. V. Appen worked for the J.A. Jones Construction Company.