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Why did the Olympic pool change colors?
2:34
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The mega mystery at the swimming events in Rio de Janeiro: What happened to Missy Franklin?
The reigning 200-meter backstroke Olympic champion -- and world record holder in the event -- finished seventh in her semifinal heat on Thursday night, which means she did not even qualify for Friday's final.
Franklin touched the wall in 2:09.74. That's nearly six seconds behind the world record swim she posted at the 2012 London Olympics (2:04.