1968 Olympics Black Power salute

During their medal ceremony in the Olympic Stadium in Mexico City on October 16, 1968, two African-American athletes, Tommie Smith and John Carlos, each raised a black-gloved fist during the playing of the US national anthem, "The Star-Spangled Banner". While on the podium, Smith and Carlos, who had won gold and bronze medals respectively in the 200-meter running event of the 1968 Summer Olympics, turned to face the US flag and then kept their hands raised until the anthem had finished.

Source: Wikipedia — 1968 Olympics Black Power salute (CC BY-SA 4.0)