Ernst Stuhlinger

Ernst Stuhlinger (December 19, 1913 – May 25, 2008) was a German-American atomic, electrical, and rocket scientist. After being brought to the United States as part of Operation Paperclip, he developed guidance systems with Wernher von Braun's team for the US Army, and later was a scientist with NASA. He was also instrumental in the development of the ion engine for long-endurance space flight, and a wide variety of scientific experiments. Provided by Wikipedia