USA's Katie Ledecky (C) poses on the podium with silver medallist Britain's Jazz Carlin (L) and bronze medallist USA's Leah Smith after she won the Women's 400m Freestyle Final during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 7, 2016.   / AFP / CHRISTOPHE SIMON        (Photo credit should read CHRISTOPHE SIMON/AFP/Getty Images)