Olympian Penny Oleksiak accepted a two-year ban for violating anti-doping rules. CBC News speaks with Olympian Reid Coolsaet, who explains the drug-testing program for competitive athletes and what a 'whereabouts failure' entails. »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS For breaking news, video, audio and in-depth coverage: https://www.cbc.ca/news Follow CBC News on TikTok: https://www.tiktok.com/@cbcnews Subscribe to CBC News on Snapchat: https://bit.ly/3leaWsr