National Museum of Nuclear Science & History
McMillan worked in the 100 F Area at Hanford during the Manhattan Project.
Homer M. O’Callaghan served in the 1st Ordnance Squadron.
John Fletcher worked for the Tennessee Eastman Corporation at the Y-12 Plant.
A Missourian by birth, W.K. ("Mac") MacCready held undergraduate and graduate degrees in physical chemistry from the University of Alabama.
