<P> By then the process of choosing a location for the Games had itself become a commercial concern; there were widespread allegations of corruption potentially affecting the IOC's decision process . In the Atlanta games in 1996, the highlight was 200 meters runner Michael Johnson annihilating the world record in front of a home crowd . Canadians savored Donovan Bailey's recording gold medal run in the 100 - meter dash . This was popularly felt to be an appropriate recompense for the previous national disgrace involving Ben Johnson . There were also emotional scenes, such as when Muhammad Ali, clearly affected by Parkinson's disease, lit the Olympic torch and received a replacement medal for the one he had discarded in 1960 . The latter event took place not at the boxing ring but in the basketball arena, at the demand of US television . The atmosphere at the Games was marred, however, when a bomb exploded during the celebration in Centennial Olympic Park . In June 2003, the principal suspect in this bombing, Eric Robert Rudolph, was arrested . </P> <P> The 2000 Summer Olympics were held in Sydney, Australia, and showcased individual performances by local favorite Ian Thorpe in the pool, Briton Steve Redgrave who won a rowing gold medal in an unprecedented fifth consecutive Olympics, and Cathy Freeman, an Indigenous Australian whose triumph in the 400 meters united a packed stadium . Eric "the Eel" Moussambani, a swimmer from Equatorial Guinea, received wide media coverage when he completed the 100 meter freestyle swim in by far the slowest time in Olympic history . He nevertheless won the heat as both his opponents had been disqualified for false starts . His female compatriot Paula Barila Bolopa also received media attention for her record - slow and struggling but courageous performance . The Sydney Games also saw the first appearance of a joint North and South Korean contingent at the opening ceremonies, though they competed as different countries . Controversy occurred in the Women's Artistic Gymnastics, when the vaulting horse was set to the wrong height during the All Around Competition . Several athletes faltered, including Russian Svetlana Khorkina, who had been favored to win gold after qualifying for the competition in first place . </P> <P> In 2004 the Games returned to their birthplace in Athens, Greece . Greece spent at least $7.2 billion on the Games, including $1.5 billion on security . Michael Phelps won his first medals in Olympic Games tallying 6 gold and 2 bronze medals . Pyrros Dimas, winning a bronze medal, became the most decorated weightlifter of all time with 3 golds and 1 bronze in Olympic Games . Although unfounded reports of potential terrorism drove crowds away from the preliminary competitions of the first weekend of the games (14--15 August), attendance picked up as the games progressed . A third of the tickets failed to sell, but ticket sales still topped figures from Seoul and Barcelona Olympics . IOC President Jacques Rogge characterised Greece's organisation as outstanding and its security precautions as flawless . The Athens Games witnessed all 202 NOCs participate with over 11,000 participants . </P> <P> The 2008 Summer Olympics were held in Beijing, People's Republic of China . Several new events were held, including the new discipline of BMX for both men and women . For the first time, women competed in the steeplechase . The fencing program was expanded to include all six events for both men and women . Women had not previously been able to compete in team foil or saber events, although women's team épée and men's team foil were dropped for these Games . Marathon swimming events, over the distance of 10 km (6.2 mi), were added . In addition, the doubles events in table tennis were replaced by team events . American swimmer Michael Phelps set a record for gold medals at a single Games with eight, and tied the record of most gold medals by a single competitor previously held by both Heiden and Scherbo . Another major star of the Games was Jamaican sprinter Usain Bolt, who became the first male athlete ever to set world records in the finals of both the 100 and 200 metres in the same Games . Equestrian events were held in Hong Kong . </P>

When was the last olympics hosted by the united states