Summer Olympic Games federal government; the country's economic crisis; health and safety concerns surrounding the Zika virus and significant pollution in the Guanabara Bay; and a state-sponsored doping scandal involving Russia, which affected the participation of its athletes in the Games. Tokyo, Japan will host the 2020 Summer Olympics, making it the first Asian city to host the Olympic Games twice. Forty-two sports, spanning 55 disciplines, have been part of the Olympic program at one point or another. Twenty-eight sports have comprised the schedule for three of the recent games, 2000, 2004, and 2008 Summer Olympics. Due to the removal of baseball and
Independent Olympians at the Olympic Games competed as Individual Olympic Athletes during the country's transition to independence. Four athletes competed as Independent Olympic Athletes at the 2012 Summer Olympics. After the dissolution of the Netherlands Antilles and subsequent withdrawal of the country's National Olympic Committee, three athletes from the country who qualified for the Games were allowed to compete independently. Several others competed for either Aruba or the Netherlands. The National Olympic Committee for South Sudan was not established between the formation of that state and the 2012 Olympic qualifying. One athlete from South Sudan, Guor Marial, qualified for the Games, and was allowed to compete