Full coverage: 2016 Rio Olympics

We begin in Brazil, where thousands of athletes from all over the world gather for the 2016 Rio Olympics Opening Ceremony.

Held at the famed Maracana stadium, the celebration also drew Brazilian stars, like supermodel Gisele Bundchen, who walked across the stadium to the sound of bossa nova hit "Girl from Ipanema".

Dancers perform during the opening ceremony of the 2016 Olymics at Maracana Stadium in Rio de Janeiro, Brazil, Aug. 5, 2016. (Xinhua/Liu Dawei)

Following tradition, the ceremony also introduced each country that will be competing in the Games. The Chinese delegation includes 35 returning Olympic champions. Brazil also used the time to call for more attention to climate change and the deforestation of the Amazon.

Each athlete will be asked to plant seeds that will eventually grow into trees and be planted in the Athletes Forest in Rio in a few years.

The fireworks is seen over Maracana Stadium during the opening ceremony of the 2016 Rio Olympic Games in Rio de Janeiro, Brazil, Aug. 5, 2016. (Xinhua/Lui Siu Wai)

Dancers perform during the opening ceremony of the 2016 Olymics at Maracana Stadium in Rio de Janeiro, Brazil, Aug. 5, 2016. (Xinhua/Liu Dawei)

The fireworks show the letters of Rio over Maracana Stadium during the opening ceremony of the 2016 Rio Olympic Games in Rio de Janeiro, Brazil, Aug. 5, 2016. (Xinhua/Lui Siu Wai)