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

Lee Seung-Hoon of South Korea celebrates victory after men's mass start event of speed skating at the 2018 PyeongChang Winter Olympic Games at Gangneung Oval, PyeongChang, Feb. 24, 2018. Lee Seung-Hoon claimed gold medal with 60 points. (Xinhua/Han Yan)