N Korea orders high alert during DMZ visit

North Korean leader Kim Jong Un has urged troops on the heavily armed border with rival South Korea to stay on high alert during a rare visit to the Demilitarised Zone. Kim\'s visit to Panmunjom comes amid a flurry of escalating militaristic rhetoric and threats from North Korea aimed at US ally South Korea just days after Washington and Pyongyang agreed to a nuclear deal seen as a breakthrough after years of deadlock. It was Kim\'s first reported trip to the DMZ since he took power after the death of his father, Kim Jong Il, in December. Details were released Sunday by state media. North Koreans also gathered Sunday in Pyongyang for a massive rally. North Korea is infuriated by US-South Korean military drills scheduled to run through April.