While the Nuremberg trials were being conducted and the ethics and rights of humanity were under investigation, the U.S. was secretly taking in Nazi scientists and giving them American identities.
Under Operation Paperclip, named so because of the paperclips used to attach the scientists' new profiles to their US personnel pages, N***s who had worked for in the infamous human experiments (which included surgically grafting twins to each other and making then conjoined, removing nerves from people's bodies without anesthetic, and testing explosion-effects on them) in Germany brought over their talents to work on a number of top secret projects for the US.
Given then-President Truman’s anti-Nazi orders, the project was kept under wraps and the scientists received faked political biographies, allowing these monsters to live on not only American soil, but as free men.
So while it was not direct experimentation, it was the U.S. taking some of the worst people in the world and giving them jobs here to do unknown, horrible experiments/research.
