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 .
North Korea proclaimed itself a `` nuclear state '' in a revised constitution this week . Analyst : Appears to be directed at the U.S. as the rhetoric from Pyongyang rises . Comes as signs are growing of activity at North Korea 's nuclear test site .