Canadian phenom Summer McIntosh was unable to beat American star Katie Ledecky in the women's 800-metre freestyle at the swimming world championships on Saturday, ending her quest to win five individual gold medals in Singapore. Read more: http://www.cbc.ca/news »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS Connect with CBC News Online: For breaking news, video, audio and in-depth coverage: http://bit.ly/1Z0m6iX Follow CBC News on TikTok: https://bit.ly/3TnHioe Follow