US v North Korea cyber warfare looming: ‘Unilateral action can escalate situation out of control’

North Korea is back online following a major blackout which left the country without Internet for more than 9 hours. That's in the wake of the latest row with Washington - which blames Pyongyang for a humiliating hack attack on Sony Pictures. For more on the Sony Hacking incident RT crossed live to Victor Gao who is the director of the China National Association of International Studies. RT ...