Natasha Hastings of the United States of America competes during the women's 4x400m relay final of Athletics at the 2016 Rio Olympic Games in Rio de Janeiro, Brazil, on Aug. 20, 2016. The U.S. team won the gold medal. (Xinhua/Zheng Huansong)
Natasha Hastings of the United States of America competes during the women's 4x400m relay final of Athletics at the 2016 Rio Olympic Games in Rio de Janeiro, Brazil, on Aug. 20, 2016. The U.S. team won the gold medal. (Xinhua/Zheng Huansong)