FILE - This combination of photos shows United States' Michael Phelps holding each of his eight gold medals after (top, left to right) the 400m individual medley, 4 x 100m freestyle relay, 200m freestyle, 200m butterfly, (bottom, left to right) 4 x 200m f
FILE - This combination of photos shows United States' Michael Phelps holding each of his eight gold medals after (top, left to right) the 400m individual medley, 4 x 100m freestyle relay, 200m freestyle, 200m butterfly, (bottom, left to right) 4 x 200m freestyle relay, 200m individual medley, 100m butterfly and the 4x100-meter medley relay at the Beijing 2008 Olympics in Beijing. Phelps retires with twice as many golds as any other Olympian, and his total of 22 medals is easily the best mark. (AP Photo, File) The Associated Press
By Associated Press

Since his Olympic debut as a 15-year-old in Sydney a dozen years ago, Michael Phelps has won twice as many golds as any other Olympian. His total of 22 medals is easily the best mark, too.

Here's a look back in photos of Phelps' Olympic career: http://apne.ws/MWORMS

EDITOR'S NOTE — "Eyes on London" shows you the Olympics through the eyes of Associated Press journalists across the 2012 Olympic city and around the world. Follow them on Twitter where available with the handles listed after each item.

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