It’s not at all uncommon to hear people say that China’s most advanced stealth fighters, the in-service Chengdu J-20 and forthcoming Shenyang FC-31, both incorporate stolen design elements from existing American and Russian fighter programs. But while Russian claims are based on observation alone… America’s claims are backed up by hard evidence and the admission of the man responsible for the effort. Let’s talk about Su Bin — the man who stole America’s stealth fighters for China.