South and North Korea will use the same flag at the Winter Olympics. The Olympics are in the South Korean city of PyeongChang. People were worried. North Korea has tested many missiles. However, both countries decided to use a "unified Korea" flag. There will also be a one-Korea ice hockey team.
The better relations could bring peace. The Koreas have been enemies since the 1950-53 Korean War. A cross-border road will open for the first time in two years. Not all Koreans are happy. South Korea's hockey coach said a united team could damage South Korea's chances of getting an Olympic medal.