Qian Xuesen
Qian Xuesen, or Hsue-Shen Tsien (; 11 December 1911 – 31 October 2009), was a Chinese mathematician, cyberneticist, aerospace engineer, and physicist who made significant contributions to the field of aerodynamics and established engineering cybernetics. Recruited from MIT, he joined Theodore von Kármán's group at Caltech. During WWII, he was involved in the Manhattan Project, which ultimately led to the successful development of the first atomic bomb in America. Later on, under the pressure of deportation for suspicions of association with communists by the Ku Klux Klan, he would eventually return to Mainland China, where he would make important contributions to China's missile and space program.