Some of South Korea’s biggest pop stars have performed in North Korea in the latest sign of thawing tensions between the two countries. On Sunday, North Korea’s leader Kim Jong-un attended the performance in Pyongyang with his wife Ri Sol-ju, sister Kim Yo-jong and other senior officials, including nominal head of state Kim Yong-nam. After the concert, which lasted for more than two hours, Kim... 

The sister of North Korean leader Kim Jong-un arrived in South Korea on Friday for the Winter Olympics, making her the first member of the country’s ruling family to cross the border since the Korean War. Kim Yo-jong arrived at Incheon International Airport on a private jet along with North Korea’s ceremonial head of state, Kim Yong-nam, and an entourage of senior officials. Kim Yong-nam is the...