The opening ceremony for the 2018 Winter Olympics in South Korea is just days away now. And much of the build-up is focusing on a band from the DPRK. It has been invited to perform at Friday's spectacle as part of a deal between the two countries. The Samjiyon group includes dozens of singers and dancers and is led by one of the DPRK's best-known performers, Hyon Song Wol. They all arrived in the host country by ferry on Tuesday. It's the first time a DPRK ship has docked in South Korea in 16 years.