In the first post-Trump Olympics, US athletes will not stay silent

Olympians are likely to test boundaries with protests and demonstrations as the Games become increasingly political

As the Rio Olympics dominated the sports world's gaze five years ago, an NFL quarterback began a series of protests against racism that rippled across America and the world and will leave an indelible mark on this year's Games.

Colin Kaepernick last made an NFL appearance in the 2016 season, but the legacy of his activism was evident even before the opening ceremony in Tokyo. Players from several women's football teams, including the US and Britain, took a knee before their games on Wednesday at the start of the first Olympics since the murder of George Floyd by a Minneapolis police officer.