Indian born American citizen, Noshir S. Gowadia, was recently convicted of spying for China. Gowadia sold China details of the B-2 bombers engine exhaust system. This technology makes it more difficult for heat sensors (like heat seeking missiles) to detect the exhaust of the B-2 engines. The information Gowadia provided would enable the Chinese to tweak their heat seeking missiles to have a better chance of hitting a B-2. Gowadia also helped Chinese engineers apply this technology to the design of a stealthy cruise missile.
Gowadia ran a Hawaii based spy ring since 1999, and made six clandestine trips to China. Gowadia worked on the B-2 project from 1968 to 1986, as one of the designers. Gowadia was arrested five years ago. He could get life in prison when he is sentenced.