Qian Xuesen dies at 98; Co-Founder of JPL and China's space program (2009)
I would not forget that he was co-founder of China's missile program too. And given how many Chinese-Americans turn out to be passing secrets to China, it's pretty disingenuous to go 'oh, he only worked for them because the US mistreated him!' He would be far from the first person whose loyalties turned out to lie where you would expect them to lie.    Let them go home? This issue has come up before. The Feds locked up H. S. Tsien [Qian Xuesen] back in the 50s because they thought he was pro-Chinese and would aid the Chinese rocket program. When they finally let him go, that’s exactly what he did.

    There have been many cases in which key individuals have been allowed to go home and fight with their homies, due to chivalry or some other form of stupidity. in 1861, the Feds let many officers go home and fight for the Confederacy. Radomir Putnik, chief of the Serbian general staff, was taking the waters in Austria when the First World War broke out. They let him go home – were they ever sorry! Gernot Zippe, an Austrian POW in a Siberian camp, built a workable centrifuge for separating isotopes. Yet, to my lasting surprise, the Soviets let him go in 1956. He became the Johnny Appleseed of nuclear proliferation [along with Eisenhower - Atoms for Peace].

https://westhunt.wordpress.com/2013/10/01/who-can-you-trust/