Cross-posted from BloodyElbow.com since boxing fans are more likely to appreciate these:

50 years ago, Muhammad Ali, then known as Cassius Clay, won the Olympic Gold Medal in Rome. To celebrate the occasion, his friend and award winning photographer, Michael Gaffney, released previously unseen pictures of the boxing legend.

More pictures here.

Gaffney also talked about the experience:

"I'd always wanted to photograph a true icon. I went off to photograph Ali at his Pennsylvanian training camp. Two weeks turned into a year. He simply told me I wasn't leaving and his words were 'I'm going to make you an offer you can't refuse'."

Gaffney was touched by Ali's genius. "I went everywhere with him. I took thousands of pictures. The pictures went all over the world, in every newspaper and magazine imaginable. But there are many in this exhibition that have never been seen."