Tensions escalate on Korean Peninsula amid mutual feasts between Pyongyang and Seoul. North Korea's leader has called for South Korea's status in his country's constitution to be changed to a separate and hostile state. South Korean President Yoon Suk Yool criticized the move and vowed to respond doubly to Pyongyang's provocations. The move comes at a time of heightened tensions on the Korean peninsula amid a series of missile tests and Pyongyang's bid to change the pattern of its relationship with its southern neighbor.