Sweden's Kalla wins first gold, Bjoergen of Norway makes history at PyeongChang Olympics

Sweden's Charlotte Kalla celebrates after winning the first place of the Ladies' 7.5km + 7.5km Skiathlon of Cross-Country Skiing at the 2018 PyeongChang Winter Olympic Games at the Alpensia Cross-Country Skiing Centre in PyeongChang, South Korea, on Feb. 10, 2018. (Xinhua/Bai Xuefei)