Boxing legend Muhammad Ali floats like a butterfly over a splayed Sonny Liston, following a stinging punch that ended one of the most controversial heavyweight matches in history. The 22-year-old Ali, a Gold Medalist at the 1960 Rome Olympics, dethroned Liston, a heavyweight champion whose knockout record intimidated many would-be contenders. Midway through the first round of the 1965 bout held in Lewistown, Maine, Ali hammered Liston to the canvas, then hit him with a barrage of taunts. Initially accused of taking a dive for the Mafia, Liston was later redeemed by slow motion fight footage that legitimized the knockout.

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