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Michael Phelps finishes Olympic career with 23 gold medals
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Michael Phelps finished his career in the most Phelps way possible -- by winning a gold medal in the 4x100-meter medley relay.
About 45 minutes later, the 31-year-old took the Olympic podium for the final time and listened to "The Star-Spangled Banner" with his gold medal draped around his neck.
Phelps fought back tears but eventually gave in, which created a chain reaction across the world. Here come the waterworks .