SEOUL, South Korea – North Korean leader Kim Jong Un and South Korean President Moon-Jae-in will plant a commemorative tree and inspect an honor guard together after Kim walks across the border Friday for their historic summit, Seoul officials said Thursday. The talks on the southern side of the border village of Panmunjom are expected to focus on North Korea's nuclear program, but there will be plenty of symbolism when Kim becomes the first North Korean leader to be in the southern section of the border since the end of the 1950-53 Korean War. Moon will receive Kim after he crosses the concrete slabs that form the rivals' military demarcation line Friday morning.