. >> john demers: at the time he gave the information to the chinese intelligence officer, he knew theyina. >> cooper: john demers is the top official in charge of the department of justice's national security division, which helps guard the u.s. against terrorism, cyber-attacks, and espionage. he's responsible for coordinating activities across law enforcement and u.s. intelligence agencies. he says kevin mallory's recruitment is just one of many efforts by the chinese ministry of state security, or m.s.s., to spy on the united states. what is m.s.s.? >> demers: so, m.s.s. is the principal intelligence agency of the chinese government. and in rough terms, it is like the c.i.a. and the f.b.i. put together. their capabilities are world- class. they have cyber capabilities, they have expertise in turning people into cooperators, and they have all of the tools and expertise of a very capable intelligence organization. >> cooper: john demers says kevin mallory hadn't worked for any u.s. intelligence agency in five years, but he was still of interest to china. he spoke mandarin, was desperat