Summer McIntosh breaks own world record in 400m IM at Canadian swimming trials | #CBCSports

Toronto's Summer McIntosh breaks her third world record at the Canadian swimming trials in Victoria, B.C., by winning the women's 400-metre individual medley with a time of 4:23.65. Watch Live sports on CBC Sports' website here: https://www.cbcsports.ca Check out all the latest Olympic news and video here: https://www.cbc.ca/sports/olympics