Question: How many German scientists, engineers, and technicians, were recruited in post-Nazi Germany as a result of the clandestine operation where Arthur Rudolph became one of the main developers of the U.S. ?space program
Sentence (from "Arthur Rudolph"): In 1984, the U.S. Government investigated him for war crimes, and he agreed to renounce his United States citizenship and leave the U.S. in return for not being prosecuted.
Relevant evidence: No