2016 Rio Olympics - Athletics - Final - Women's 100m Hurdles Final - Olympic Stadium - Rio de Janeiro, Brazil - 17/08/2016. Gold medallist Brianna Rollins (USA) of USA (C), silver medallist Nia Ali (USA) of USA (R) and bronze medallist Kristi Castlin (USA) of USA (L) hold up the U.S. flag. REUTERS/Lucy Nicholson