Buses that carry journalists and volunteers cross a bridge of the Transolimpica BRT, an express road built through a shantytown to join the Rio 2016 Olympic venues of Deodoro and Barra da Tijuca, in the Vila Uniao favela of Rio de Janeiro, August 12, 2016. REUTERS/Nacho Doce

A mililtary vehicle crosses a bridge of the Transolimpica BRT, an express road built through a shantytown to join the Rio 2016 Olympic venues of Deodoro and Barra da Tijuca, in the Vila Uniao favela of Rio de Janeiro, August 12, 2016. REUTERS/Nacho Doce

2016 Rio Olympics - Rowing - Final - Women's Eight Final A - Lagoa Stadium - Rio De Janeiro, Brazil - 13/08/2016. Bronze medalists Roxana Cogianu (ROU) of Romania, Ioana Strungaru (ROU) of Romania, Mihaela Petrila (ROU) of Romania, Iuliana Popa (ROU) of Romania, Madalina Beres (ROU) of Romania, Laura Oprea (ROU) of Romania, Adelina Bogus (ROU) of Romania, Andreea Boghian (ROU) of Romania, Daniela Druncea (ROU) of Romania (top), gold medalists Emily Regan (USA) of USA, Kerry Simmonds (USA) of USA, Amanda Polk (USA) of USA, Lauren Schmetterling (USA) of USA, Tessa Gobbo (USA) of USA, Meghan Musnicki (USA) of USA, Ellie Logan (USA) of USA, Amanda Elmore (USA) of USA, Katelin Snyder (USA) of USA and silver medalists Katie Greves (GBR) of Britain, Melanie Wilson (GBR) of Britain, Frances Houghton (GBR) of Britain, Polly Swann (GBR) of Britain, Jessica Eddie (GBR) of Britain, Olivia Carnegie-Brown (GBR) of Britain, Karen Bennett (GBR) of Britain, Zoe Lee (GBR) of Britain, Zoe De Toledo (GBR) of Britain react after the finish. REUTERS/Jeremy Lee

2016 Rio Olympics - Rowing - Final - Women's Eight Final A - Lagoa Stadium - Rio De Janeiro, Brazil - 13/08/2016. Emily Regan (USA) of USA, Kerry Simmonds (USA) of USA, Amanda Polk (USA) of USA, Lauren Schmetterling (USA) of USA, Tessa Gobbo (USA) of USA, Meghan Musnicki (USA) of USA, Ellie Logan (USA) of USA, Amanda Elmore (USA) of USA, Katelin Snyder (USA) of USA pose after winning gold medal. REUTERS/Murad Sezer

2016 Rio Olympics - Rowing - Final - Women's Eight Final A - Lagoa Stadium - Rio De Janeiro, Brazil - 13/08/2016. USA team of Emily Regan (USA) of USA, Kerry Simmonds (USA) of USA, Amanda Polk (USA) of USA, Lauren Schmetterling (USA) of USA, Tessa Gobbo (USA) of USA, Meghan Musnicki (USA) of USA, Ellie Logan (USA) of USA, Amanda Elmore (USA) of USA, Katelin Snyder (USA) of USA athletes embrace after the finish. REUTERS/Jeremy Lee

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 - Final - Women's Shot Put Final - Olympic Stadium - Rio de Janeiro, Brazil - 12/08/2016. The foot of gold medalist Michelle Carter (USA) of the USA is pictured. REUTERS/Kai Pfaffenbach

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/Phil Noble