The Mangueira slum is backdropped by fireworks exploding above the Maracana stadium during the opening ceremony of the Rio's 2016 Summer Olympics in Rio de Janeiro in Rio de Janeiro, Brazil, Friday, August 5, 2016. (Photo by Leo Correa/AP Photo)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Spectators use their mobile phones for illumination. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Fireworks explode during the opening ceremony. (Photo by Pawel Kopczynski/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. The Brazilian national flag is raised during the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Fabrizio Bensch/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Brian Snyder/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Brazilian top model Gisele Bundchen takes part in the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Brazilian top model Gisele Bundchen takes part in the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Actors perform during the opening ceremony. (Photo by Fabrizio Bensch/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Ivan Alvarado/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers sing during the opening ceremony. (Photo by Issei Kato/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Issei Kato/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Shannon Stapleton/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. People celebrate as they take part in the opening ceremony. (Photo by Damir Sagolj/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Lucy Nicholson/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers look on as they take part in the opening ceremony. (Photo by Damir Sagolj/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. A performer takes part in the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Issei Kato/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Ivan Alvarado/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. The Afghanistan (AFG) team arrives for the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Fabrizio Bensch/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Damir Sagolj/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by David Gray/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Sarah Attar (KSA) of Saudi Arabia waves flags during the opening ceremony. (Photo by Stoyan Nenov/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. The Australia (AUS) team arrives for the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. An athlete from China waves her flag as she arrives in the stadium during in the opening ceremony. (Photo by Stefan Wermuth/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Damir Sagolj/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Athletes of Bhutan take part in the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. A general view during the opening ceremony. (Photo by Fabrizio Bensch/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Stephanie Au (HKG) of Hong Kong carries their flag in the opening ceremony. (Photo by Stefan Wermuth/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Flagbearer Maria Londa (INA) of Indonesia leads her contingent during the opening ceremony. (Photo by Stoyan Nenov/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Athletes of Colombia take part in the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Athletes from Greece march in as they take part in the opening ceremony. (Photo by Damir Sagolj/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Athletes from the United States and fans celebrate during the opening ceremony. (Photo by Damir Sagolj/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Flagbearer Caroline Wozniacki (DEN) of Denmark leads her contingent during the opening ceremony. (Photo by Dylan Martinez/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Athletes from India (IND) enter the stadium. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Fans celebrate during the opening ceremony. (Photo by Damir Sagolj/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Athletes of Ghana take part in the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Athletes of Russia take part in the opening ceremony. (Photo by Stoyan Nenov/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Indonesia's athletes during the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Athletes of the US during the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Flag-bearer Ivana Andusic Maksimovic (SRB) of Serbia marches in during the opening ceremony. (Photo by Damir Sagolj/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Fans from Brazil celebrate in the stands during the opening ceremony. (Photo by Damir Sagolj/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Torch bearer Gustavo Kuerten arrives at the stadium. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Flagbearer Therese Alshammar (SWE) of Sweden leads her contingent during the opening ceremony. (Photo by Stoyan Nenov/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Flagbearer Merdan Atayev (TKM) of Turkmenistan leads his contingent during the opening ceremony. (Photo by Stoyan Nenov/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Stoyan Nenov/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Fireworks explode during the opening ceremony. (Photo by Ivan Alvarado/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Brazil arrives for the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Children run with kites in the shape of doves. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Performers take part in the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Indonesia's athletes during the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Coloured portraits are seen at the back of the stage. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Flagbearer Andy Murray (GBR) of Great Britain leads his contingent during the opening ceremony. (Photo by Jeremy Lee/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Serbian athletes during the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Athletes of Tajikistan during the opening ceremony. (Photo by Kai Pfaffenbach/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Spectators cheer as members of Brazil's team take part in the opening ceremony. (Photo by Marko Djurica/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Fireworks explode during the opening ceremony. (Photo by Pawel Kopczynski/Reuters)





2016 Rio Olympics, Opening ceremony, Maracana, Rio de Janeiro, Brazil on August 5, 2016. Flagbearer Chong Wei Lee (MAS) of Malaysia leads his contingent during the opening ceremony. (Photo by Stoyan Nenov/Reuters)