During the 1968 Olympics medal ceremony in Mexico, two USA athletes, Tommie Smith & John Carlos, raised a black glove fist for "Black Power" when USA national anthem was played. Violation of Olympic rules to keep out politics.
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Olympic Committee later stripped them of their medals, removed their names from Olympic Records. They never existed. Justice was served.
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https://en.wikipedia.org/wiki/1968_Olympics_Black_Power_salute