Summer Olympic Games demand for tickets to all levels of each event, there was controversy when seats set aside for sponsors and National Delegations went unused in the early days. A system of reallocation was put in place so the empty seats were filled throughout the Games. Rio de Janeiro, Brazil hosted the 2016 Summer Olympics, becoming the third city in the Southern Hemisphere to host the Olympic Games after Melbourne, Australia, in 1956 and Sydney, Australia, in 2000, and the first South American city to host the Olympics. The preparation for these Games was overshadowed by controversies, including the instability of Brazil's
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