FILE - In this Dec. 12, 2012 file photo released by Korean Central News Agency, North Korea's Unha-3 rocket lifts off from the Sohae launch pad in Tongchang-ri, North Korea.North Korea

 

              FILE - In this Dec. 12, 2012 file photo released by Korean Central News Agency, North Korea
FILE - In this Dec. 12, 2012 file photo released by Korean Central News Agency, North Korea's Unha-3 rocket lifts off from the Sohae launch pad in Tongchang-ri, North Korea.North Korea vowed Monday, Jan. 14, 2013, to strengthen its defenses amid concerns the country may conduct a nuclear test as a follow-up to last month's long-range rocket launch. Citing U.S. hostility, Pyongyang's Foreign Ministry said in a memorandum that North Korea will “continue to strengthen its deterrence against all forms of war.” (AP Photo/KCNA, File)