ceremony the sister of kim jong-un has arrived in south korea i suppose you could call her lil' kim akiko, this is going to be nothing short of colorful. you have a tongan cross-country skier and you have a nigerian women's bobsled team >> yes, it will be a colorful crowd. a lot of people have been walking in with this flag. this is the unified korean flag we will see the south and north korean athletes march behind we have the olympic stadium behind me all lit up ready to go all 12 olympic venues ready to go it's tough to imagine this is the region that is among the least developed here in south korea. now, before the olympic journey began here, there was no major railway, no major airport and just one major highway since then south korea invested $13 billion in infrastructure to prepare for the winter games a big chunk of that going towards a new high speed rail system >> the new rail line connects south korea's capitalto some o the country's most remote villages the 280 kilometer track carrying passengers east to a little known coastline only accessible by car until now this man rode t