Over the course of three Olympics, Michael Phelps broke records that stood for decades on his way to becoming the most decorated Olympian in history. The Baltimore native took home his record 19th medal — and 15th gold — Tuesday as part of the 4x200-meter relay. Phelps has announced he will retire after the London Games.
July 31, 2012 Michael Phelps poses with his gold medal after the men's 4x200-meter freestyle relay swimming final at the 2012 Summer Olympics in London. Matt Slocum/AP Buy Photo