Our Pick
Posted on @rawstates
Y-12 and the calutron girls
1943
Oak Ridge, Tennessee
Public domain · Wikimedia Commons
Uranium was separated electromagnetically in machines wound with silver borrowed from the Treasury, because copper was scarce, 14,700 tons of it, all returned afterwards. The operators were young local women trained to watch dials and told nothing. They outperformed the physicists, who kept adjusting things.
That was 1 of the hidden places.
Location: documented spot
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