The Olympic Games (French: les Jeux olympiques) (JO), is a major international event featuring summer and winter sports, in which thousands of athletes participate in a variety of competitions. The Olympic Games have come to be regarded as the world’s foremost sports competition where more than 200 nations participate. The Games are currently held every two years, with Summer and Winter Olympic Games alternating, although they occur every four years within their respective seasonal games. Originally, the ancient Olympic Games were held in Olympia, Greece, from the 8th century BC to the 4th century AD. Baron Pierre de Coubertin founded the International Olympic Committee (IOC) in 1894. The IOC has since become the governing body of the Olympic Movement, whose structure and actions are defined by the Olympic Charter.

The evolution of the Olympic Movement during the 20th and 21st centuries has resulted in several changes to the Olympic Games. Some of these adjustments include the creation of the Winter Games for ice and winter sports, the Paralympic Games for athletes with a physical disability, and the Youth Olympic Games for teenage athletes. The IOC has had to adapt to the varying economic, political, and technological realities of the 20th century. As a result, the Olympics shifted away from pure amateurism, as envisioned by Coubertin, to allow participation of professional athletes. The growing importance of the mass media created the issue of corporate sponsorship and commercialization of the Games. World Wars led to the cancellation of the 1916, 1940, and 1944 Games. Large boycotts during the Cold War limited participation in the 1980 and 1984 Games.

The Honourable Usain St. Leo Bolt, OJ, C.D. ( /ˈjuːseɪn/; born 21 August 1986), is a Jamaican sprinter and a five-time World and three-time Olympic gold medalist. He is the world record and Olympic record holder in the 100 metres, the 200 metres and (along with his teammates) the 4×100 metres relay. He is the reigning Olympic champion in these three events, and is one of only seven athletes (along with Valerie Adams, Veronica Campbell-Brown, Jacques Freitag, Yelena Isinbayeva, Jana Pittman, Dani Samuels) to win world championships at the youth, junior, and senior level of an athletic event.

Bolt won a 200 m gold medal at the 2002 World Junior Championships, making him the competition's youngest-ever gold medalist at the time (since surpassed by Jacko Gill). In 2004, at the CARIFTA Games, he became the first junior sprinter to run the 200 m in less than 20 seconds with a time of 19.93 s, breaking the previous world junior record held by Roy Martin by two-tenths of a second. He turned professional in 2004, and although he competed at the 2004 Summer Olympics, he missed most of the next two seasons due to injuries. In 2007, he broke Don Quarrie's 200 m Jamaican record with a run of 19.75 s.

Aries Merritt (born July 24, 1985) is an American hurdler who specialises in the 110 meters hurdles, and is the reigning U.S. National Indoor Champion in the 60 meter hurdles.

A native of Marietta, Georgia, he attended Joseph Wheeler High School, where he was teammates with Reggie Witherspoon.

Merritt had a successful college athletic career: in 2006 he won the NCCA Championships, was undefeated in all hurdles events that year, and he broke Willie Gault's University of Tennessee hurdles record. His victory at the NCCA Championships in 13.21 was the second fastest ever collegiate time in the United States (only Renaldo Nehemiah had run faster). He took the 110 meter hurdles gold at the 2004 World Junior Championships and finished sixth at the 2006 World Athletics Final. He reached the World Athletics Final in 2008, finishing in fourth.

In Istanbul, Merritt became world champion on the 60 meters hurdles by beating Liu Xiang and Pascal Martinot-Lagarde in 7.44.

Michael Fred Phelps (born June 30, 1985) is an American swimmer who has, overall, won 16 Olympic medals—six gold and two bronze at Athens in 2004, and eight gold at Beijing in 2008, becoming the most successful athlete at both of these Olympic Games editions. In doing so he has twice equaled the record eight medals of any type at a single Olympics achieved by Soviet gymnast Alexander Dityatin at the 1980 Moscow Summer Games. His five gold medals in individual events tied the single Games record set by compatriot Eric Heiden in the 1980 Winter Olympics and equaled by Vitaly Scherbo at the 1992 Summer Games. Phelps holds the record for the most gold medals won in a single Olympics; his eight at the 2008 Beijing Games surpassed American swimmer Mark Spitz's seven-gold performance at Munich in 1972. Phelps' Olympic medal total is second only to the 18 Soviet gymnast Larisa Latynina won over three Olympics, including nine gold. Phelps also holds the all-time record for most gold Olympic medals, at 14.

Mohamed "Mo" Farah (Somali: Muxammad Faarax, Arabic: محمد فرح‎; born 23 March 1983 in Mogadishu, Somalia) is a Somalia-born British international track and field athlete, and current 5000 m world champion. On the track, he generally competes over 5000 metres and 10,000 metres, but also runs the 3000 metres and occasionally the 1500 metres. He has expressed a desire to move up to the marathon after the 2012 Olympics.

Farah holds the European track record for 10,000 metres, the British road record for 10,000 metres, the British indoor record in the 3000 metres, the British track record for 5000 metres, the British half-marathon record, and the European indoor record for 5000 metres. In July 2010, Farah won Britain's first-ever men's European gold medal at 10,000 m. He followed this with a gold in the 5000 m, becoming the 5th male athlete to complete the long-distance double at the championships and the first British man to do so. At the 2011 World Championships in Athletics, he won silver in the 10,000 m and gold in the 5000 m.