At the opening ceremonies on Friday, Pence sat stone-faced in his seat as Moon and North Korean officials stood together with much of the stadium to applaud their joint team of athletes.
They shook hands with Moon and cheered for athletes from the two countries who marched under a unified peninsula flag for the first time in a decade.
Elsewhere, gold medals are on offer in cross-country skiing, biathlon, speed skating, short track speed skating and ski-jumping and the first gold medal of the 2018 Olympics is likely to come in cross country skiing. It is one we are dealing with.
South Korean officials have said Moon was invited to Pyongyang to speak with Kim Jong Un during the talks and lunch that Moon hosted at the presidential Blue House in Seoul on Saturday.
The Korean women's hockey team, the first in Olympic history to combine players from North and South, took the ice Saturday night for their debut game in front of a raucous, sellout crowd on another historic night mixing sports and politics on an global stage.
The glamorous ladies, all in their late teens or early 20s, are said to be handpicked from elite universities and undergo strict background checks.
Koreas share historic handshake at Olympic opening ceremony
It marked the first time in eight and a half years that a ranking DPRK delegation visited South Korea's presidential complex. The games are seen as a pivotal moment for relations between the two countries, who have been officially at war since 1950.
Some noticed that while the cheerleaders from North Korea, all dressed in their red uniform, were singing about unification, South Korean rappers were singing "Uptown Funk" by Bruno Mars.
There has been a dramatic cooling of tensions on the Korean peninsula in the past two months and Moon has made it clear he hopes the rapprochement can continue after the Winter Olympics in Pyeongchang ends. The rhetoric war between North Korea and the Trump administration hasn't skipped a beat in PyeongChang.
Kim Yong Nam, the North's nominal head of state who was also at Saturday's meeting, said "even unexpected difficulties and ordeals could be surely overcome and the future of reunification brought earlier when having a firm will and taking courage and determination to usher in a new heyday of inter-Korean relations".
Some North Korean experts believe tough United Nations sanctions that are cutting off most of the isolated North's sources of revenue have added pressure on Pyongyang to engage further with Seoul.
Shin So-jung, the goaltender for the Korean women's hockey team.
While Moon did not hesitate to shake hands and smile with his North Korean visitors, Pence didn't appear to even look in the direction of the North Korean delegation during the Friday event.
In recent weeks, USA security researchers at the security firms McAfee and FireEye warned about an escalating nation-state attack on Olympic organizations.