In the chaos following the Second World War, the US government faced a critical decision: what to do with the great scientific minds of the Third Reich. Many were accused of war crimes, some had stood trial at Nuremburg. Nevertheless, the US secretly decided that their knowledge of rocketry and medical advances were vital to the outcome of the Cold War. Drawing on exclusive interviews with dozens of Paperclip family members, colleagues, and interrogators, and dossiers discovered in archives across the world, this book follows more than a dozen German scientists through their postwar lives and into one of the most guarded government secrets of the twentieth century.