Kamila Valieva is a teenage figure-skating star from Russia. It turns out she failed a drugs test in December—but officials decided not to disclose the results until she helped her team win gold in Beijing's Winter Olympics this week.
— Read the restValieva tested positive for trimetazidine, which is used in the prevention of angina attacks, but is on the banned list because it is classed as a cardiac metabolic modulator and has been proven to improve physical efficiency.
