<a href="https://en.wikipedia.org/wiki/North_Korea" id="mwAXk" rel="mw:WikiLink" title="North Korea">North Korea</a> allegedly tests <a href="https://en.wikipedia.org/wiki/2009_North_Korean_nuclear_test" id="mwAXo" rel="mw:WikiLink" title="2009 North Korean nuclear test">its second nuclear device</a>, after which Pyongyang also conducts several missile tests, building tensions in the international community.