The 2016 Olympic Games officially start in Rio on August 5 with the opening ceremony at the Maracana Stadium. Athletes from 206 nations and a refugee team are in Brazil to compete in 28 sports and be watched by a global audience of billions.
BBC: Rio set for Olympics opening ceremony
Fireworks are seen during a rehearsal of the opening ceremony of the Rio 2016 Olympic Games in Rio de Janeiro on August 3, 2016.
