this case. >> it was around 2003 that i joined the fbi, and immediately upon arriving to the squad it was evident our number one threat was china. >> the fbi is calling for your help in identifying chinese spies amid growing evidence that china is now this nation's greatest intelligence threat. >> china is a huge country. it's a growing country. it's asserting itself. most information worth having is here in the united states. china is our largest counterintelligence threat, easily. what was clear from the beginning was the technology that was at risk was naval technology. >> fbi headquarters asked ssa headquarters to send an agent to investigate the information. that happened to be me. the information we bring to that investigation is we understand the technology. we understand the navy platforms. i'm always motivated to protect the navy's technologies.