an historic moment at the winter olympics, but it has nothing to do with sports. north korean leader kim jong-un's sister will be there as part of the north korean delegation. you can see her in this video sending off north korea's troupe. this is the first time ever, we should mention, that a member of the kim dynasty will set foot in south korea. and this comes as vice president mike pence is set to lead the american delegation at the games. then this morning, pence had some harsh words for pyongyang during his visit to japan. >> the united states of america will soon unveil the toughest and most aggressive round of economic sanctions on north korea ever. and we will continue to isolate north korea until it abandons its nuclear and ballistic missile program once and for all. >> cnn's senior international correspondent ivan watson is live from pyeongchang. you can see the ski slopes