by Claire Bigg, Radio Free Europe, Russia - Kamola, a 36-year-old ethnic-Uzbek woman living in Moscow, was stepping out of a metro carriage on her way to work last month when a blow sent her tumbling to the station's marble floor. The punch came without warning, dealt by a young man wearing brass knuckles. A second assailant then picked up the woman's limp body while his friend struck her repeatedly in the face and stomach.