The Margin: Who is Kamila Valieva, the Russian figure skater on thin ice at the Beijing Winter Olympics after testing positive for a banned heart drug?

4 things to know about teen phenom Kamila Valieva and the heart medication drug trimetazidine that’s sent figure skating into a spin

4 things to know about teen phenom Kamila Valieva and the heart medication drug trimetazidine that’s sent figure skating into a spin