To this day one of the most secret USA intelligence programs, Operation Paperclip illegally brought 760 Nazi scientists to America in the wake of WWII. Many had committed numerous war crimes, including conducting biomedical experiments on humans at concentration camps and in secret Lebensborn labs.
Image is of 104 Operation Paperclip rocket scientists taken at Fort Bliss, Texas in 1946. Wernher von Braun, Ludwig Roth and Arthur Rudolph, are picture among the scientists. Many had worked to develop the V-2 Rocket at Peenemünde Germany and were brought to the U.S. after World War II.