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

Gold medalist Lee Seung-Hoon (C) of South Korea, silver medalist Bart Swings (L) of Belgium and bronze medalist Koen Verweij of the Netherlands pose for photos duing medal ceremony of men's mass start event of speed skating at the 2018 PyeongChang Winter Olympic Games at Gangneung Oval, PyeongChang, Feb. 24, 2018. (Xinhua/Wang Song)