In this October 16, 1968 photo, US athletes Tommie Smith, centre, and John Carlos, right, stare downward during the playing of the "Star-Spangled Banner" after Smith received the gold and Carlos the bronze in the 200 metre run at the Summer Olympic Games in Mexico City. On the left is Peter Norman. AP Photo
In this October 16, 1968 photo, US athletes Tommie Smith, centre, and John Carlos, right, stare downward during the playing of the "Star-Spangled Banner" after Smith received the gold and Carlos the bShow more

Save Gaza wristbands, Black Power salute and wearing the poppy - political symbols in sport