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 Independent Olympic Participants. Macedonian athletes could not appear under their own flag because their National Olympic Committee (NOC) had not been formed. The Federal Republic of Yugoslavia (Serbia and Montenegro) was under United Nations sanctions which prevented the country from taking part in the Olympics. However, individual Yugoslav athletes were allowed to take part as Independent Olympic Participants. 58 athletes competed as Independent Olympic Participants, winning three medals. The former Soviet Union competed under the Olympic flag at the 1992 Winter Olympics and 1992 Summer Olympics as a Unified Team. At the 2000 Summer Olympics, four athletes from East Timor