Calutron Girls - a group of female high school graduates hired to monitor a calutron (a type of mass spectrometer) used in the making of the first atomic bomb in The Manhattan Project. The Calutron Girls weren't told exactly what they were monitoring; it was years until it was revealed. They observed a legendarily strict code of conduct that forbade socializing, discussion of their job, congregating in large groups, etc.
Y-12 National Security Complex. Oak Ridge, Tennessee. 1945:
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The woman in the front-right of the photo is Gladys Owens, who recalled to historians in later years:
Shift change at Y-12:She did not socialize on the job, she remained constantly focused on the meter reading and the necessary adjustments she made to keep the beam current maximized in the calutrons (although she had no idea that was what she was doing). In fact she was not even allowed to discuss her work at all with anyone at anytime. When asked what happened to people who talked too much, she said "I know of people disappearing." One young girl who did not return to her dormitory for her clothes was said to have "died from drinking some poison moonshine."
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Running a lie detector test on a potential worker:
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