National Museum of Nuclear Science & History
Spear worked at the 200 East Area at Hanford during the Manhattan Project.
Thomas Jenkins worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Litchfield worked in the 100 F Area at Hanford during the Manhattan Project.
Julian Mack was an American physicist. Mack was the leader of Group G-11 (Optics), the photography group, in the Weapons Physics Division at Los Alamos during the Manhattan Project.