Combo photo shows (from L to R)Allison Schmitt, Leah Smith, Maya Dirado, Katie Ledecky of the United States of America acting during the women's 4x200m freestyle relay final of swimming at the 2016 Rio Olympic Games in Rio de Janeiro, Brazil, on Aug. 10, 2016. The United States of America won the gold medal with 7 munites 43.03 seconds. (Xinhua/Ding Xu)