Mr. Hinteler, I want to quote one of the sources that you provided links to:"Von Braun was smuggled into Canada by the OSS first and then came to U.S. through Operation OVERCAST."(
http://www.ufoconspiracy.com/reports/von_braun_fbi_file48.htm ). I did not discuss details of Mr. von Braun's ways of immigration, but it happens that the U.S. Government wanted him in the USA. In another words, he immigrated to the USA by invitation of the U.S. government.
One more quotation from the Columbia Encyclopedia:" Von Braun was an ardent advocate of rocket development and space flight, acting as America's best-known spokesman for space exploration. He became a U.S. citizen in 1955."(
Columbia Article On Von Braun). How can a person that has not been born in the USA become a citizen without having immigrated? Does American INS grant citizenship to foreigners in absentia? I have serious doubts about this.
Nowhere in the encyclopedic article it is mentioned that Mr. von Braun was a Nazi war criminal. It is impossible to claim that any scientist or engineer having operated under Nazi regime was a deliberate Hitler's accomplice. Such an approach would lead to meaningless accusations of the prominent German physicists Werner von Heisenberg, Max von Laue, Otto Hahn and Fritz Strassmann that did not emigrate after Nazis having seized power in 1933.
Regarding usage of slave labor. I am sure that the people responsible for this are not scientists and engineers, but military and SS officials that dealt with administration and management of project, and, of course, the Nazi regime per se that found it possible to use slaves' labor.
The only inaccuracy of mine regarding Mr. von Braun refers to spelling of his first name ?- he is Wernher, and not Werner.