A new doping scandal has erupted involving Olympic swimmers from China. Chinese authorities and the World Anti-Doping Agency found the drug trimetazidine but cleared the swimmers and did not flag problems to Olympic officials. Several who tested positive went on to win medals, including three gold medals. Jeffrey Brown discussed the latest with Travis Tygart of the U.S. Anti-Doping Agency.

Stream your PBS favorites with the PBS app: https://to.pbs.org/2Jb8twG
Find more from PBS NewsHour at https://www.pbs.org/newshour
Subscribe to our YouTube channel: https://bit.ly/2HfsCD6

Follow us:
TikTok:   / pbsnews  
Twitter:   / newshour  
Instagram:   / newshour  
Facebook: http://www.pbs.org/newshour

Subscribe:
PBS NewsHour podcasts: https://www.pbs.org/newshour/podcasts
Newsletters: https://www.pbs.org/newshour/subscribe