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Countdown to Zero examines why nuclear danger did not disappear after the Cold War. It traces the atomic bomb’s history while considering terrorism, proliferation, theft of fissile material, accidents and miscalculation as separate routes to catastrophe.
Director Lucy Walker combines archival material with testimony from former heads of government, diplomats and security specialists. The documentary uses those perspectives to argue that reducing nuclear arsenals and improving safeguards are practical global-security questions, not only abstract policy goals.
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