Now China Accuses U.S. Of Hacking Its Defence Websites
Description:A war of words between Beijing and Washington ignited last month after a U.S. computer security company said a Chinese military unit was behind a series of hacking attacks. The firm, Mandiant, identified this Shanghai military hub as the most likely source of the hacks. Now China says its own military websites were subjected to hundreds of thousands of cyber hacks last year.(1:29)