Von Braun
Wernher von Braun surrendered to the U.S. after World War II and divulged the secrets of German rocket technology.
U.S./rocket January 1946 -- First U.S. V-2 Launch

Wernher von Braun, technical director of Germany's long-range missile program, surrendered to the U.S. Army and revealed the capabilities of the German rockets. Concentration camp workers, forced by the Nazis to help produce the V-2s, were questioned by the Allies and asked to aid in identifying the necessary parts for its construction.

Captured missiles were taken to the White Sands Proving Ground in New Mexico, where von Braun oversaw their reassembly and testing. The first V-2s fired were German-built. Two months later, the U.S. tested its first American-made copy.

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