Watch | The life and times of boxing legend Muhammad Ali

Muhammad Ali, the magnificent heavyweight champion whose fast fists and irrepressible personality transcended sports and captivated the world, has died. He was 74.

Ali suffered for years from Parkinson's Syndrome, a disease that ravaged his body but could never dim his larger-than-life presence. A towering figure in his prime, he still traveled and made appearances in his later years despite being muted by the thousands of hits he took during his remarkable career. He beat the invincible Sonny Liston, fought a string of thrilling fights with Joe Frazier and stopped George Foreman in the “Rumble in the Jungle” in Zaire. But he paid a terrible price for the estimated 29,000 punches he took to his head during a career that made him perhaps the most recognized person on earth.

“I am the greatest,” Ali thundered again and again. Here's presenting the life and times of the Greatest.