"The families are well connected and intensely loyal to the Kim family regime". He made it clear from the start that he came to the Games with a message of "maximum pressure" on Pyongyang.
Kim sent the invitation to the South through a particularly close and trusted envoy: his only sister, Kim Yo Jong.
Moon is scheduled to host a luncheon at the Blue House presidential palace in Seoul Saturday for the delegation.
The Trump administration is wary of engagement with the North, which has been subjected to increasingly tough global sanctions, unless it shows clear signs of giving up its nuclear weapons program.
The Games aren't just a time of competing.
"I have been very good for many years but I'm also getting older and the younger girls are getting better", Bjoergen said.
The official also noted that while Trump believes in talking, in this case, the issue is not about words but about deeds on North Korea's part. Saturday's game ended in a crushing 8-0 loss to Switzerland.
"Now, if we put our hearts and minds together, it will continue to grow larger and larger and turn into a snowman of peace".
Deepening the odd-man-out optics for Pence, Moon and Kim, smiling broadly, exchanged a handshake and cheered the team enthusiastically.
But rather than account for only about 21 percent of a show filled with music, dance, puppetry and other pageantry, NBC opted to make the walk-and-wave presentation of flags, parkas and mobile phones 38 percent of the program.
The rival countries did send representatives to the opening ceremonies, with USA vice-president Mike Pence and North Korea's ceremonial leader Kim Yong Nam both in attendance. A guest of Pence's was Fred Warmbier, father of Otto Warmbier, a college student North Korea imprisoned for 17 months who died shortly after being released while in a coma.
But the South's unification ministry said the report was based on an incorrect assumption.
But both sides have held their ground.
A rush of gold medals isn't expected until later in the Olympic schedule, but the United States' medal count should grow with a few second- and third-place finishes.
Global alarm at the rapid advance of nuclear-armed North Korea's weapons technology rose further previous year when the regime tested its Hwasong-15 ballistic missile theoretically capable of hitting the mainland U.S., in a challenge to Washington that has threatened to "utterly destroy" the regime in the event of an attack.