On May 25, 1965, Leifer snapped a photo of Muhammad Ali knocking out Sonny Liston in a rematch of a world heavyweight title bout at the Central Maine Youth Center in Lewiston, which today is known ...

When Muhammad Ali knocked down Sonny Liston on May 25, 1965, a 22-year-old photographer named Neil Leifer was ringside. Decades later, the image he captured still has our attention.