2016 Rio Olympics - Athletics - Final - Women's Shot Put Final - Olympic Stadium - Rio de Janeiro, Brazil - 12/08/2016. Michelle Carter (USA) of USA celebrates after winning the gold medal in the women's shot put. REUTERS/Kai Pfaffenbach

2016 Rio Olympics - Athletics - Final - Women's 10,000m Final - Olympic Stadium - Rio de Janeiro, Brazil - 12/08/2016. Almaz Ayana (ETH) of Ethiopia celebrates next to Tirunesh Dibaba (ETH) of Ethiopia. REUTERS/Alessandro Bianchi

2016 Rio Olympics - Athletics - Final - Women's Shot Put Final - Olympic Stadium - Rio de Janeiro, Brazil - 12/08/2016. Michelle Carter USA) of USA celebrates after winning gold. REUTERS/Kai Pfaffenbach

2016 Rio Olympics - Athletics - Victory Ceremony - Women's 10,000m Victory Ceremony - Olympic Stadium - Rio de Janeiro, Brazil - 12/08/2016. Gold medallist Almaz Ayana (ETH) of Ethiopia, silver medallist Vivian Jepkemoi Cheruiyot (KEN) of Kenya and bronze medallist Tirunesh Dibaba (ETH) of Ethiopia pose with their medals. REUTERS/Alessandro Bianchi

2016 Rio Olympics - Athletics - Women's Heptathlon 200m - Olympic Stadium - Rio de Janeiro, Brazil - 12/08/2016. Nafissatou Thiam (BEL) of Belgium reacts. REUTERS/David Gray

2016 Rio Olympics - Athletics - Final - Women's Shot Put Final - Olympic Stadium - Rio de Janeiro, Brazil - 12/08/2016. Michelle Carter (USA) of USA competes on her way to the gold medal in the women's shot put. REUTERS/Kai Pfaffenbach

2016 Rio Olympics - Athletics - Victory Ceremony - Men's 20km Race Walk Victory Ceremony - Olympic Stadium - Rio de Janeiro, Brazil - 12/08/2016. Zhen Wang (CHN) (Athletics) of China with the gold medal, Cai Zelin (CHN) of China with the silver medal and Dane Bird-Smith (AUS) of Australia with the bronze medal pose on podium. REUTERS/Alessandro Bianchi

2016 Rio Olympics - Athletics - Final - Women's Shot Put Final - Olympic Stadium - Rio de Janeiro, Brazil - 12/08/2016. Valerie Adams (NZL) of New Zealand reacts. REUTERS/Kai Pfaffenbach