In 1943, on orders from the German Air Ministry, young physicist Peter P. Wegener left the Russian front and reported to the Baltic village of Peenemunde. His assignment was to work at the supersonic wind tunnels of the rocket laboratories of the German Army. Here Wernher von Braun led a team that developed the V2, the world's first large rocket-powered guided missile, and laid much of the groundwork for postwar rocket development. In this fascinating book, Wegener recounts his experiences during Hitler's time, World War II, and his years at Peenemunde. Shortly before the end of the war, Wegener visited Germany's underground V2 production plant to retrieve archival material on aerodynamics that had been stored in caves for safekeeping.