Despite favorable coverage in the South Korean media that largely ignored the horrors inflicted on North Koreans by Kim's regime, many ordinary South Koreans were skeptical of the North's motives.
Kim Jong-il, Kim's father, had met with two South Korean presidents in Pyongyang, the North Korean capital, before his death in 2011: with President Kim Dae-jung in 2000, and with President Roh Moo-hyun in 2007.
The rival countries did send representatives to the opening ceremonies, with US vice-president Mike Pence and North Korea's ceremonial leader Kim Yong Nam both in attendance.
In the crowd, the Vice-President of the United States and just behind him, Kim Jo Jong, the sister of the North Korean leader.
Others, such as 23-year-old Yoon Jun-young, were angry that North Korea's participation on the global sporting stage had come without any political concessions.
"Having these red communists in the heart of Seoul is an utter humiliation!" one shouted near the venue as dozens of others waved banners condemning Moon and Kim Jong-un.
One of the best things, in my opinion, is we have a McDonald's in our dining hall.
Erin Hamlin of US carries the national flag.
It's too early to say, Mattis said, "if using the Olympics in a way to reduce tension - if that's going to have any traction once the Olympics are over".
As we approached the stadium you could hear the music and cheering and see all of the lights.
Internet problems before and during the opening ceremony of the Winter Olympics on Friday night are being investigated as a possible cyberattack, officials said Saturday.
Pence "did not come across" the North Koreans at the reception, a Pence spokesman said.
The North Koreans went through a busy schedule in South Korea as the world watched their every move.
"We're very, very confident the federations and athletes know what they can and can't do".
Meanwhile, five gold medals are up for grabs on the first day of full competition in the Winter Olympics today, which features the debut of a unified Korean ice hockey team.
Moon is scheduled to host a luncheon at the Blue House presidential palace in Seoul Saturday for the delegation. "It was done in hockey, so why not with us?" he said.
He said the Koreas should create an environment so that a summit could take place.
Moon would like to bring both North Korea and the United States to the table.
The ratings for NBC's coverage of the pre-Winter Olympics in PyeongChang, South Korea, dropped by almost 40 percent in the key demographic compared to the 2014 games, according to The Hollywood Reporter Friday.