Muhammad Ali Lights the Cauldron in Atlanta (1996)

Muhammad Ali's trembling hand lighting the Atlanta cauldron in 1996 remains the most watched Olympic flame ceremony in history, drawing an estimated 3.5 billion viewers globally. Ravaged by Parkinson's disease, the three-time heavyweight champion had to be steadied as he held the torch aloft, his physical struggle visible to the world. Even a decade later, this sequence is still replayed more than any other Olympic lighting moment, surpassing even the 1984 L.A. spectacle.