This country's neighbor pledged to join the Proliferation Security Initiative in 2009, leading to this country's declaration that the their namesake Armistice of 1953 was invalid. That year also saw two U.S. journalists sentenced by this country for 
This country's neighbor pledged to join the Proliferation Security Initiative in 2009, leading to this country's declaration that the their namesake Armistice of 1953 was invalid. That year also saw two U.S. journalists sentenced by this country for entering illegally, leading to a visit by former president (*) Bill Clinton, and the March 2010 sinking of the warship Cheonan was allegedly caused by a torpedo from this country. November 2010 saw the bombing of Yeonpyeong Island by, for ten points, what East Asian country with capital Pyongyang, bordered by China and South Korea?
This country's neighbor pledged to join the Proliferation Security Initiative in 2009, leading to this country's declaration that the their namesake Armistice of 1953 was invalid.
{North Korea} or {D}emocratic {P}eople’s {R}epublic of {K}orea (prompt on {Korea})