Gold medalist Olivia Smoliga (C) of the United States, silver medalist Etiene Medeiros (L) of Brazil and bronze medalist Daria Vaskina of Russia pose for photos after the women's 50m backstroke final at the Gwangju 2019 FINA World Championships in Gwangju, South Korea, July 25, 2019. (Xinhua/Wang Jingqiang)