The US government is increasingly concerned that advances in North Korea's weapons program have dramatically decreased the warning time for a nuclear attack on America or its allies, according to US officials.
원문출처 : http://www.cnn.com/2016/08/17/politics/north-korea-nuclear-attack-warning-time/index.html
원문출처 : http://www.cnn.com/2016/08/17/politics/north-korea-nuclear-attack-warning-time/index.html