Bids for the 1996 Summer Olympics "political instability, potential security problems, air pollution, traffic congestion and the fact that it would have to spend about $3 billion to improve its infrastructure of airports, roads, rail lines and other amenities". Allegations were quick to emerge in the Greek and Australian media that Atlanta had won the Games due to a conspiracy organized by global beverage company Coca-Cola, a longtime sponsor of the Olympic Games headquartered in Atlanta. An Athenian daily newspaper declared the "Olympic flame will not be lit with oil, but with Coca-Cola", while the Athens bid chair said that the city would never again bid
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