Nana Takagi wins gold as speed skating mass start event makes Winter Olympics debut

Kim Bo-Reum of South Korea celebrates after finishing ladies' mass start event of speed skating at the 2018 PyeongChang Winter Olympic Games at Gangneung Oval, PyeongChang, Feb. 24, 2018. Kim Bo-Reum claimed silver medal with 40 points. (Xinhua/Han Yan)