Not only that, but the project director of the friggin Saturn V - Arthur Rudolph - was forced to rescind his US citizenship or face charges for war crimes because he had managed a factory during the war - Mittelwerk - that killed more forced labourers by building the V-2 than died in the V-2 bombings (20,000 vs 9,000 V-2 casualties).

https://en.wikipedia.org/wiki/Arthur_Rudolph

https://en.wikipedia.org/wiki/Mittelwerk

https://en.wikipedia.org/wiki/Mittelbau-Dora_concentration_c...

https://en.wikipedia.org/wiki/V-2_rocket