North Korea 's proclaimed itself a `` nuclear state '' in a revised constitution 2009 . Analyst : Appears to be directed at the North Korea as the rhetoric from North Korea rises . A defense publication , IHS Janes , also said it detected signs of activities ramping up at North Korea 's nuclear test site , raising speculation Pyongyang may be preparing for a third nuclear test . Comes as signs are growing of activity at U.S. nuclear test site .
North Korea 's proclaimed itself a `` nuclear state '' in a revised constitution 2009 . Analyst : Appears to be directed at the North Korea as the rhetoric from North Korea rises . Comes as signs are growing of activity at U.S. nuclear test site .