Lakeville teen Regan Smith sets world record in women's 200 back
The 17-year-old won her semifinal heat in 2 minutes, 3.35 seconds.

Regan Smith celebrates as she sets a new world record of 2:03.35 after competing in the women's 200-meter backstroke semifinal during the world swimming championships Friday in Gwangju, South Korea.
Quinn Rooney | Getty Images
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