He passed away at 98.
The description of his life in Wikipedia http://en.wikipedia.org/wiki/Qian_Xuesen or just click here.
I just finished a book on him by Iris Chang. It was translated from English to Chinese. A very fascinating life.
99.9% chance he was not a communist when he was in US. He was a dedicated scientist.
The joke of the century is the witch hunt of communists in US and drove Tsien back to China to help China to develop missiles. It speeds up China’s missile development by at least 10 years when China did not know how to build good bicycle.
Did Middle East and N.Korea benefit from his initial work?
The book mentioned one or two flaws in his life. I believe he needed to do to secure political stability and funding for his work.