It is 40 years since American athletes Tommie Smith and John Carlos chose the Olympic Games to stage their protest against the treatment of black people in their country.
Smith, who won the 200m at the 1968 Mexico Olympics, and Carlos, who finished third in the same event, bowed their heads and raised gloved fists skyward after receiving their medals.
Forty years on, documentary maker Geoff Small has been investigating the events that led up to Smith and Carlos' protest.
He made some interesting discoveries and you can read more about those here: news.bbc.co.uk/sport1/hi/oly...
His documentary will be aired on Wednesday, 9 July at 2100 BST on BBC Four.
Were you around in 1968 and if so, what are your memories of the event and the aftermath?
And were Smith and Carlos right to make their stand at the Olympics?