ሰሜን ኮሪያ ባለፈው መስከረም ወር ባደረገችው ስድሰተኛው የኒኩሌር ሙከራ ተከትሎ ውጥረቱ እየተባባሰ መምጣቱ ይታወቃል።
Tensions were particularly heightened by North Korea's sixth nuclear test in September and the assassination of Kim Jong Nam in February.