American sprinters Tommie Smith and John Carlos use the 1968 Olympic 200m medal ceremony to send a message to oppose racial discrimination.
From Wilma Rudolph's gripping success to Dick Fosbury's game-changing high jump, here are some inspiring Olympic stories.
The Games are only the beginning; check out the stories of these inspiring athletes.
Budd and Decker tangle ends medal hopes
One of the most famous and contentious falls in Olympic history sees Mary Decker and Zola Budd miss out in the 3000m final in Los Angeles.
Dick Fosbury changes high jumping forever with his "Fosbury flop" technique at the Olympic Summer Games Mexico City 1968.