LONDON (Reuters) - Doping moved back into the spotlight at the London Olympics on Saturday with at least two more confirmed positive cases and a string of high-profile doping offenders returning to the world's biggest sports stage in search of restitution.
On the day when athletics, the flagship sport of the Games, took centre stage with its big names starting their quest for gold, Colombian 400 metres runner Diego Palomeque Echevarria became the latest athlete to be banned following a positive first test for performance-boosting testosterone.