Summer Olympic Games swimmer Mark Spitz, Lasse Virén (of Finland)'s back-to-back gold in the 5,000 meters and 10,000 meters (defeating American distance running great Steve Prefontaine in the former), and the winning of three gold medals by 16-year-old Soviet gymnastic sensation Olga Korbut - who thrilled the world with an historic backflip off the high bar. Korbut, however, failed to win the all-around, losing to her teammate Ludmilla Tourischeva. There was no such tragedy in Montreal in 1976, but bad planning and fraud led to the Games' cost far exceeding the budget. The Montreal Games were the most expensive in Olympic history, until
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