Olympics swimming: Rebecca Soni breaks breastroke world record
American Rebecca Soni secures a place in the 200m breaststroke final by setting a new world record of two minutes and 20.00 secs.
Her time erased 0.12 off the previous world record of 2:20.12, set by Canada's Annamay Pierse at the 2009 world championships in Rome.
Soni qualified for Thursday's final more than two seconds ahead of her nearest rival, Denmark's Rikke Pedersen.
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