
Hidden in America's secret city, ordinary women unknowingly built history's deadliest weapon. Kiernan's bestseller reveals the untold Manhattan Project heroines who shaped WWII's outcome, earning Amazon's Top 100 recognition for transforming "non-fiction as it should be written."
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In 1942, the U.S. government quietly acquired 59,000 acres of Tennessee farmland and began building something extraordinary - a secret city that would eventually house 75,000 people while officially not existing on any map. Behind fences and checkpoints, thousands of workers - many of them young women from small towns across America - labored on equipment they didn't understand, forbidden from asking questions about their purpose. The muddy construction site transformed into the fifth-largest city in Tennessee, with dormitories, cafeterias, theaters, and massive industrial facilities operating 24 hours a day. Security was omnipresent: propaganda posters warned that "loose lips sink ships" while the most famous Oak Ridge billboard featured Uncle Sam with three monkeys representing "see no evil, hear no evil, speak no evil" alongside the message: "What you see here, what you do here, what you hear here, when you leave here, let it stay here." Only when atomic bombs fell on Hiroshima and Nagasaki in August 1945 did these workers discover what they had been creating all along - enriched uranium for the world's first nuclear weapons.
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