“North and South Korea have agreed to march together under a single ‘unified Korea’ flag at next month’s Winter Olympics in the South. They also agreed to field a joint women’s ice hockey team in rare talks at the truce village of Panmunjom.” And not everyone is happy about it. South Korean coaches and fans are worried the addition of North Korean athletes will hamper their chances of getting a medal, while Japanese leaders are warning the world not to be fooled by Pyongyang’s charm offensive.