Kim Jong Un walks south to meet his rival: Can they deal?

A man watches the North side from the unification observatory in Paju, near the border with North Korea, South Korea, Thursday, April 26, 2018. 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. (AP Photo/Ahn Young-joon)
North Korean soldiers, center, walk, as South Korean soldiers stand, bottom, at the border village of Panmunjom in the Demilitarized Zone, South Korea, Thursday, April 26, 2018. 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.(Hwang Kwang-mo/Yonhap via AP)
Four North Korean soldiers, center far, and four South Korean soldiers, right and left, stand at the border village of Panmunjom in the Demilitarized Zone, South Korea, Thursday, April 26, 2018. 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.(Hwang Kwang-mo/Yonhap via AP)
Elementary school students read banners placed on a barbed wire fence with messages wishing for the reunification of the two Koreas at the Imjingak Pavilion in Paju, South Korea, near the border with North Korea, Thursday, April 26, 2018. 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. (AP Photo/Ahn Young-joon)
Members of the South Korean women's peace group stage a rally to support the upcoming summit between South and North Korea at the Imjingak Pavilion in Paju, South Korea, near the border with North Korea, Thursday, April 26, 2018. 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. (AP Photo/Ahn Young-joon)
A South Korean military vehicle passes by unification flags near Unification Bridge, which leads to the Panmunjom in Paju, South Korea, Thursday, April 26, 2018. 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. (AP Photo/Ahn Young-joon)
A South Korean army soldier, center, talks with police officers as they stand guard at Unification Bridge, which leads to Panmunjom in Paju, South Korea, Thursday, April 26, 2018. 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. (AP Photo/Ahn Young-joon)
A banner showing the pictures of South Korean President Moon Jae-in, left, and North Korean leader Kim Jong Un to welcome the planned summit between South and North Koreas is seen near the presidential Blue House in Seoul, South Korea, Thursday, April 26, 2018. Seoul says North Korean leader Kim Jong Un and South Korean President Moon-Jae-in will plant a tree together and inspect an honor guard after Kim walks across the border for the leaders' historic summit. The letters read " Peace, A New Start." (AP Photo/Lee Jin-man)
South Koreans hold unification flags to welcome the planned summit between South Korean President Moon Jae-in and North Korean leader Kim Jong Un near the presidential Blue House in Seoul, South Korea, Thursday, April 26, 2018. Seoul says North Korean leader Kim Jong Un and South Korean President Moon-Jae-in will plant a tree together and inspect an honor guard after Kim walks across the border for the leaders' historic summit. (AP Photo/Lee Jin-man)
South Koreans pose for the media as they hold a banner showing the pictures of South Korean President Moon Jae-in, left, and North Korean leader Kim Jong Un to welcome the planned summit between South and North Koreas near the presidential Blue House in Seoul, South Korea, Thursday, April 26, 2018. Seoul says North Korean leader Kim Jong Un and South Korean President Moon-Jae-in will plant a tree together and inspect an honor guard after Kim walks across the border for the leaders' historic summit. The letters read " Peace, A New Start." (AP Photo/Lee Jin-man)
South Koreans hold a banner showing the pictures of South Korean President Moon Jae-in, left, and North Korean leader Kim Jong Un to welcome the planned summit between South and North Koreas near the presidential Blue House in Seoul, South Korea, Thursday, April 26, 2018. Seoul says North Korean leader Kim Jong Un and South Korean President Moon-Jae-in will plant a tree together and inspect an honor guard after Kim walks across the border for the leaders' historic summit. The letters read " Peace, A New Start." (AP Photo/Lee Jin-man)
South Korean President Moon Jae-in's chief of staff Im Jong-seok speaks during a press conference in Goyang, South Korea, Thursday, April 26, 2018. Seoul says North Korean leader Kim Jong Un and South Korean President Moon Jae-in will plant a tree together and inspect an honor guard after Kim walks across the border for the leaders' historic summit. The signs read: " Peace, A News Start and summit between South and North Korea." (AP Photo/Ahn Young-joon)

GOYANG, South Korea— There will be plenty to gawk at Friday when North Korean leader Kim Jong Un walks south across the world’s most heavily armed border and stands face-to-face with South Korean President Moon Jae-in. Two men who seemed on the verge of war months ago will take a pleasant walk, plant a commemorative tree, inspect an honor guard and belly-up to a lavish banquet.