Canada at the Summer Olympics became the first Canadian Summer Olympian to win a medal in four straight Olympics. After George Hodgson won two gold medals in the 1912 Stockholm games, it would be 72 years before Alex Baumann became the second Canadian swimmer to win Olympic gold, when he won both individual medley events in world record time in the 1984 Los Angeles games. Victor Davis (1984), Anne Ottenbrite (1984), Mark Tewksbury (1992) and Penny Oleksiak (2016) are the only other Canadian swimmers to win gold medals. In 2004, Canada failed to win a medal of any colour in swimming for the first time
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