Swimming at the 2008 Summer Olympics in the 100 metres butterfly, both set in Sydney, remained Olympic records. Michael Phelps of the United States also broke the record for the most gold medals ever won by an Olympian with a total of 14; 8 of which were won during the 2008 Summer Olympics - this was also a world record. <nowiki>*</nowiki> World record split from the 4 × 100 m freestyle relay Note: At the 4 × 100 m freestyle relay final, anchor Jason Lezak swam the fastest 100 m split (46.06); however, this is not considered an official FINA record, as he did not swim
Concerns and controversies at the 2008 Summer Olympics that it would begin retesting samples for CERA. In April 2017, the Olympics has had the most (49 of 50) Olympic medals stripped for doping violations. Russia is the leading country with 14 medals stripped off. The International Labour Organization (ILO) estimated that China had 150 million migrant workers out of a total national working population of 764 million people at the end of 2006. More than 40 million of these migrant workers were employed in construction, an industry in which some 90 percent of the workforce was composed of migrants. 2008 Summer Olympics migrant workers routinely endured dangerous work