National Museum of Nuclear Science & History
McCullough worked in the 100 D Area at Hanford during the Manhattan Project.
W. J. Scanlan worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Pfennig worked for Stone and Webster Engineering Corporation.
Wilbert “Walt” Meyers (1921-2013) served in the Special Engineer Detachment (SED) at Los Alamos during the Manhattan Project.