Canadian teenage swimmer Summer McIntosh breaks another world record

Sixteen-year-old Summer McIntosh broke the world record for the 400m individual medley at the Canadian swimming trials on Saturday — just days after breaking the world record for the 400m freestyle.Sixteen-year-old Summer McIntosh broke the world record for the 400m individual medley at the Canadian swimming trials on Saturday — just days after breaking the world record for the 400m freestyle.