National Museum of Nuclear Science & History
John Butler worked for the H. K. Ferguson Company.
Bonnie Pauline Hardwick Rogers worked at the Y-12 Plant, operating the machinery separating the uranium isotope U-235 from it's heavier counterpart U-238.
McGuire worked for Stone and Webster Engineering Corporation.
Winifred T. Koziolek was a laboratory technician the Chemistry Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
