National Museum of Nuclear Science & History
John Arnold joined the Manhattan Project in 1943 when the MED tasked his employer, the Kellogg Corporation, with developing a special barrier for the gaseous diffusion plant in Oak Ridge.
Ardis (Thomas) Monk was a research assistant and mathematician at the University of Chicago Met Lab, where she performed computations for Eugene Wigner’s theoretical physics group.
Hope Sloan was 25 in 1944, a dark-haired WAC corporal and secretary in military intelligence. In July, she joined the construction camp's morale-building effort by entering a beauty contest, part of an "exposition "promoting safety on and off the job.
Joseph Colella, Jr. served in the 1st Ordnance Squadron.
