North Korea blows up inter-Korean office, raising tensions

North Korea blew up an inter-Korean liaison office building just north of the heavily armed border with South Korea on Tuesday, in a carefully choreographed display of anger that sharply raises tensions on the Korean Peninsula and puts pressure on Washington and Seoul amid deadlocked nuclear diplomacy.The demolition of the building, which was in North Korean territory and had no South Koreans working in it, is largely symbolic.It will pose a serious setback to the efforts of liberal South Korean