The World Anti-Doping Agency has published a scathing report into widespread doping in the sport of athletics.
The report, in particular, signalled out Russia, which it said should be banned from athletics competition for running a "state-supported" doping programme.
Now, there are calls for the Russian athletics federation to be banned - and its athletes barred from next year's Olympic Games in Rio de Janeiro.
The latest scandal follows others in world football, rugby league, cycling and other sports.
We ask: How extensive is corruption in sport, and how can the scourge be fixed?
Presenter: Nick Clark
Ross Tucker, Professor of Exercise Physiology at the School of Medicine at the University of the Free State.
Lea Cleret, Head of Research Policy and Education for International Centre for Sports Security.
Julian Savulesco, Medical Ethicist at the University of Oxford.
Source: Al Jazeera