In 2017, the U.S. released films from a generation of nuclear tests -- allowing scientists to study the last images of thermonuclear explosions we hope we'll ever see. But just getting them took years of trying – and dozens of nuclear explosions. In Los Angeles, a secret film studio, Lookout Mountain, staffed by Hollywood professionals, produced countless films aimed at diverse audiences from policymakers to soldiers, scientists to civilians. The goal: convince anyone who will listen – including themselves – that they knew how to wield this new power. Many of these films are being made public for the first time ever, shedding new light on one of the darkest and most dangerous times in history. New waves of declassified films, photographs and documents are telling us more than we ever knew about the Cold War.