At the end of World War II, as Allied forces uncovered the full horror of Nazi atrocities, the United States government made a calculated decision: recruit the scientists who had built Hitler's war machine. Under Operation Paperclip, more than 1,600 German engineers, physicists, and aerospace specialists were brought to America—their records sanitized, their pasts obscured, their expertise deemed too valuable to surrender to the Soviets. This book reconstructs that decision through declassified military and intelligence documents, State Department correspondence, survivor testimony from concentration camp laborers, and the personal records of the scientists themselves. It examines how Wernher von Braun and his colleagues transitioned from designing V-2 rockets built by forced labor at Mittelwerk to leading NASA's most celebrated programs, including the Saturn V rocket that carried Americans to the moon. The narrative does not reduce these men to simple villains or heroes. Instead, it interrogates the institutional logic that made Paperclip possible—the Cold War calculus that placed technological advantage above justice, the bureaucratic processes that erased criminal records, and the survivors of Nazi labor camps who spent decades demanding acknowledgment that was never fully given. A carefully documented account of how national interest and moral accountability collided in postwar America, and what that collision cost.