Russia's Kamila Valieva topped the short programme on Tuesday – Copyright AFP PRAKASH MATHEMA Peter STEBBINGS Teenage Russian figure skater Kamila Valieva will go for a second Beijing Olympics title on Thursday, the next chapter in a damaging doping scandal which has overshadowed the Games. The 15-year-old burst into tears after topping Tuesday’s first half of the women’s singles competition to put herself in prime position ahead of the all-important free skate. Valieva has dominated the second week of the Games in the Chinese capital after the Court of Arbitration for Sport ruled that she should not be thrown out…