Many performances at recent Olympic Games continue to be exposed as fraudulent, as the International Olympic Committee announced on Friday that it had identified 45 more athletes who tested positive for banned substances at the 2008 Beijing Games and the 2012 London Games. Half of them were medalists.
The I.O.C.’s announcement followed a broad re-examination of drug-test results and was the second of its kind since May, when Olympic officials revealed that a first round of re-analysis of Olympic samples found that 53 athletes from at least 12 countries had used banned substances at the last two Summer Games.