Here's a look back at the top 10 memorable moments from the London Olympics.
Michael Phelps ended his remarkable swimming career by winning four gold and two silver medals in London. He is now the most decorated Olympian ever, with a career total of 22 medals, 18 of them gold. In his final swim, he helped the U.S. reclaim the lead in the 4x100-meter relay, and afterward he got a special trophy from swimming officials that said: "To Michael Phelps, the greatest Olympic athlete of all time."
* United States' swimmer Michael Phelps holds up a silver trophy after being honored as the most decorated Olympian at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Saturday, Aug. 4, 2012. Phelps was honored with a special individual ceremony after concluding his record-breaking career Saturday as the most decorated Olympian.
The speed. The medals. The poses. It could only be Usain Bolt, who electrified the London Games by becoming the first man to win the 100, 200 and 4x100 relay golds in back-to-back Olympics. Even IOC President Jacques Rogge, who initially balked at giving him "living legend" status, conceded that the six-time gold medalist "is the best sprinter of all time."
* Jamaica's Usain Bolt celebrates his win in the men's 4 x 100-meter relay final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 11, 2012. Jamaica set a new world record with a time of 36.84 seconds.
Gabby Douglas rocked the O2 Arena with her electric floor routine, her vaults, her leaps high above the balance beam. The 16-year-old won two gold medals, including the all-around, and the rest of the Fierce Five — Jordyn Wieber, McKayla Maroney, Kyla Ross and Aly Raisman — gave the United States its first Olympic team title in women's gymnastics since 1996.
* U.S. gymnast Gabrielle Douglas acknowledges the audience after being declared winner of the gold medal during the artistic gymnastics women's individual all-around competition at the 2012 Summer Olympics, Thursday, Aug. 2, 2012, in London.
Three British athletes won gold medals in Olympic Stadium in 44 minutes on Saturday, Aug. 4, to produce the signature night of the London Games: Jessica Ennis won the heptathlon, Greg Rutherford won the long jump, and Mo Farah won the 10,000 meters. (The Somali-born Farah also won the 5,000 meters on the final Saturday.) Counting two golds from the rowers and another from women's track cycling, Britain's total for the day was six.
They played to lose. The top-seeded women's badminton pair from China, two pairs from South Korea and one from Indonesia were disqualified from the Olympics after they intentionally lost their matches in order to secure a more favorable draw in the quarterfinals. Olympic officials wanted team coaches, trainers or officials of the four doubles pairs to be punished if they encouraged or ordered the eight players to lose intentionally.
* China's Yu Yang, left, and Wang Xiaoli talk at the end of the women's doubles badminton match against Jung Kyun-eun and Kim Ha-na, of South Korea, at the 2012 Summer Olympics, Tuesday, July 31, 2012, in London. World doubles champions Wang and Yu, and their South Korean opponents were booed loudly at the Olympics on Tuesday for appearing to try and lose their group match to earn an easier draw.
Oscar Pistorius described his journey from South Africa to the London Olympics as "amazing," and it was. The double-amputee known as the "Blade Runner" because he runs on carbon-fiber blades had the 80,000-strong crowd roaring as he anchored the South African team in the 4x400-meter relay final. It didn't matter that he finished eighth. He can add "Olympic finalist" to his long list of unprecedented achievements.
* South Africa's Oscar Pistorius, center, wait for the batons during the men's 4x400-meter relay final during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Friday, Aug. 10, 2012.
Women's boxing was a big hit in its first Olympics, and it produced three memorable champions: Claressa Shields, the 17-year-old middleweight with the vicious right hand who established herself as the future of the sport; lightweight Katie Taylor of Ireland, the Bray Brawler whose bouts had thousands cheering with Irish pride; and Nicola Adams, the British flyweight who won the first gold medal.
American Manteo Mitchell heard a pop in his left leg with 200 meters to go in his segment of the 4x400 relay preliminaries, and the sprinter knew it was not good. If he stopped, he would lose the race, so he finished the lap, then limped to the side to watch his teammates complete the relay. The United States eventually made it into the finals and won the silver behind the Bahamas.
* United States' Manteo Mitchell competes in a 4x400-meter relay heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Thursday, Aug. 9, 2012. A few hours later, doctors confirmed what he suspected: He had run the last 200 meters with a broken left fibula.
It lasted only 82 seconds, but it will be long remembered: Young judo fighter Wojdan Ali Seraj Abdulrahim Shahrkhani became the first Saudi woman to compete at an Olympics. Wearing a modified hijab, Shahrkhani drew roars from the crowd as she stepped on the mat against Puerto Rico's Melissa Mojica, who quickly defeated her. Saudi resident Alaa Al-Mizyen said afterward: "Wojdan remains a winner to me and millions of men AND women around the world." Qatar and Brunei also sent female Olympians for the first time.
* Saudi Arabia's Wojdan Ali Seraj Abdulrahim Shahrkhani parades along with her team during the Opening Ceremony at the 2012 Summer Olympics in London.
The Olympics kicked off with a royal command performance. At the opening ceremony, a short film on the stadium's big screen showed actor Daniel Craig as James Bond driving to Buckingham Palace and meeting Queen Elizabeth II, who played herself. "Good evening, Mr. Bond," she said. Next they were shown flying in a helicopter over Olympic Stadium, where stunt doubles parachuted in.
* A person dressed as Queen Elizabeth II parachutes into the Olympic stadium during the Opening Ceremony of the 2012 Olympic Summer Games at the Olympic Stadium in London, Friday, July 27, 2012.