RIP: Muhammad Ali dies at 74

so sad ,  the all-time legend,  Muhammad Ali, and three-time heavyweight champion boxer died after a battle with a respiratory illness. He was 74.

At the time fighting under his birth name, Cassius Clay first gained worldwide notice at the 1960 Olympic Games in Rome, where he won gold as a heavyweight. He more fully burst onto the public scene in 1964, when as a 7-1 underdog he fought and defeated Sonny Liston for the professional heavyweight championship. Loudly and frequently vowing to "float like a butterfly and sting like a bee," Ali knocked out Liston in seven rounds, becoming, at the time, the youngest champion in history, at the age of 22.