August 3, 2012
Michael Phelps puts on his gold medal after winning the men's 100-meter butterfly swimming final during the 2012 Summer Olympics. (File)
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Michael Phelps, the most decorated Olympian of all time, is coming out of retirement.
The U.S. — winners of 104 medals overall in London, easily the most of any nation — won 45 golds at Paris in 1924 and Mexico City in 1968, marking the highest total the nation has ever taken home from a "road" Olympics.