American Regan Smith, 17, broke Missy Franklin's world record in the 200-meter backstroke in 2:03.35 in the semifinal heat at world championships.
High schooler Regan Smith crushes Missy Franklin's world record in 200-meter backstroke
American Regan Smith, 17, broke Missy Franklin's world record in the 200-meter backstroke in 2:03.35 in the semifinal heat at world championships.
