kuo had another source inside the pentagon, and kuo was connected to spies on the west coast who were u.s. space and naval technology. presumably, the u.s. is doing the same kind of spying in china, but michelle van cleave says america has so much more to lose. >> i think we're a real candy store for the chinese and for others in terms of technology and commercial products or other proprietary information, and so we will always be the principal target for them. >> what is the most serious damage that chinese espionage has done to the united states? >> it's the totality of the collection effort. take a case like this or cases like this-- traditional espionage, penetration of the interior-- couple that with industrial and economic collection. couple that with cyber. it greatly concerns me. it greatly concerns me. >> well, i hope this all works out. i mean, you are helping me a lot here, but i don't want anyone to know about our relationship or anything because it could get me in a lot of trouble. >> bergersen kept saying, "i could go to jail," and both men did. in 2008, prosecutors show