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North and South Korea have agreed send a joint women's ice hockey team to the 2018 Winter Olympics, and to march together at the games' opening ceremony. North Korea, has also offered to send a troupe of 230 cheerleaders to the games. But why have they done it? Jean Lee was the AP bureau chief in Pyongyang, and is now with the Wilson Center think-tank.

Picture: North Korean cheer team members wave their national flags at an event in 2003. Credit: Getty Images