Amazing moments from past Summer Olympics

Gold medalist Usain Bolt, center, of Jamaica crosses the finish line in new world record time of 9.69 seconds ahead of silver medalist Richard Thompson, left, of Trinidad/Tobago, and last place finisher USA's Darvis Patton, right, in the finals of the men's 100 meter run during the 2008 Beijing Olympics. One of the greatest sprinters of all time, Bolt won the 100 and 200 meters. He would do the same in 2012 and 2016 also helping Jamaica to win the 4x100 relay.

USA's Abbey D'Agostino is helped by Nikki Hamblin of New Zealand during the women's 5000 meter preliminaries in the Rio 2016 Summer Olympic Games. During the race Hamblin fell with D'Agostino close behind taking her down also, D'Agostino awkwardly twisting her leg. Hamblin stopped to help D'Agostino up, one of the great moments in sportsmanship, and both finished the race, each allowed to compete in the final despite finishing outside the limit. D'Agostino did not compete in the final because of her injuries.

Bob Beamon of the USA breaks the Long Jump World Record during the 1968 Olympic Games in Mexico City. Beamon long jumped 29 ft 2 1/2 in, winning the gold medal and setting a new world record. It is the first jump over 28 ft. While the middle distance runners from the low level countries floundered in the thin air of Mexico City, those in the explosive events reached new peaks, none higher than Beamon, who added almost 23 inches to the world record with a jump. In Imperial measure terms it looked even more impressive since he missed out 28 feet, taking the record to 29 ft 2 ins. It was twelve years before anyone else reached 28 feet and the record stood until 1991 when Mike Powell of the US leapt 29.3 feet in Tokyo to win the world title.

The US basketball team shows their frustration to the decision of the officials giving the gold medal to the Soviet Union in at the Olympic games in Munich, West Germany on Sept. 10, 1972. With USA leading 50-49, officials reset the clock giving Soviet another chance for a basket. They made it making the score 51-50 in favor of Soviet Union. US protested the decision.

Vanderlei de Lima of Brazil is grabbed by a lone spectator while leading the men's Olympic marathon during the Athens 2004 Olympic Games on August 29, 2004. De Lima got away and rejoined the race, holding his leg, with around 15 minutes to run but lost the lead to Italian Stefano Baldini soon after. Lima finished third.

Ben Johnson of Canada (L) leads (2nd L-R) Desai Williams of Canada, Dennis Mitchell of the U.S., Calvin Smith of the U.S, Linford Christie of Britain and Carl Lewis of the U.S. to the finish line to win the men's 100 meters sprint final at the Olympics in Seoul, South Korea, September 24, 1988. Johnson would be disqualified after testing positive for steroids. Carl Lewis of the U.S. was awarded gold.

Gold medalist Matthias Steiner of Germany poses with a picture of his late wife Susann during the medal ceremony for the men's +105 kg weightlifting event during the 2008 Beijing Olympic Games in Beijing on August 19, 2008. Steiner honored his wife Susann after she died in a car accident in 2007.

During the 1968 Summer Olympics in Mexico City, American sprinters Tommie Smith, center, and John Carlos took the medal stands and raised black-glove fists during the playing of the national anthem. Smith had just won gold and set a world record of 19.83 seconds in the 200-meter dash. Carlos won bronze. Also on the medal stand was Peter Norman of Australia who won silver.

McKayla Maroney reacts on the podium after winning the silver medal in the vault competition at North Greenwich Arena in the London 2012 Olympic Games. Her reaction ended up being on of the most viral moments of the games.

Mary Decker (USA) lies injured on the ground after getting tripped up by Zola Budd (ENG) (not pictured) during the women's 3000m event at Los Angeles Memorial Coliseum during the 1984 Los Angeles Olympics on Aug. 10, 1984.

Michael Phelps, left, yells with Garrett Weber-Gale, right, as the USA team came from behind thanks to anchor swimmer Jason Lezak, in water, to win the gold during the men's 4x100 meter freestyle relay finals at the National Aquatic Center at the Beijing Olympic games. Lezak's legendary swim preserved Phelps' chance to win eight gold medals at the games.

Jackie Joyner-Kersee performs the high jump during the Heptathlon in the 1988 Olympics in Seoul, South Korea on Sept. 3, 1988. One of the greatest athletes of all time, Joyner-Kersee shattered the world record for the Heptathlon during the five discipline event with a score of 7,291 which stood until 2008. She won a total of three gold, one silver and two bronze in her four Olympics.

American Bill Mills wins the 10,000 meter race ahead of Tunisian Mohamed Gammoudi and Australian Ron Clarke as part of the Tokyo 1964 Olympic Games on October 14, 1964. Born on the Pine Ridge Indian Reservation in South Dakota, Mills won the 10,000 meters, still the only American to ever win the race.

Angel Valodia Matos of Cuba lands a kick to the head of referee Chakir Chelbat of Sweden after being disqualified from his bronze medal contest in the men's +80 kg taekwondo competition against Arman Chilmanov of Kazakhstan during the 2008 Beijing Olympic Games in Beijing.

Carl Lewis crosses the finish line with arms in the air, winning the Gold for the men's 100 meters in the 1984 Olympics in Los Angeles, Calif. Concidered one of the greatest track and field athletes of all time, Lewis won the 100, 200 and long jump and went on to help the 4x100 win gold in Los Angeles. He would win a total of ten medals over four Olympics.

Technically still at war, Olympic athletes from North and South Korea march together as one team into Olympic Stadium during Opening Ceremonies at the 2000 Sydney games. The idea of joining the 180 team members was suggested before a summit of the two Korean leaders who's peninsula has been separated since 1953.

Derek Redmond of Great Britain winces in pain as he is helped by his father, Jim Redmond at the end of the men's 400 meter semi-final. He was injured mid-way through the race, snapping his hamstring, but insisted on finishing. Redmond's father broke from stands and chased by officials, reached his son to help him cross the finish line, creating one of the most inspirational moments of all time.

A hoax student athlete enters the stadium at the end of the marathon at the 1972 Olympic Games in Munich, causing confusion for everyone including eventual winner Frank Shorter who followed on the track at the same time. Shorter was the third American to win the marathon, but it was the third time that an American would enter the stadium second. In 1904 and 1908, both "winners" were disqualified for cheating and getting illegal help.

Katie Ledecky of the United States reacts after winning the Women's 800m Freestyle Final on Day 7 of the London 2012 Olympic Games at the Aquatics Centre on Aug. 3, 2012 in London, England. Ledecky was only fifteen years old. She would go on to win four gold and a silver at the 2016 Rio games and is one of the favorites for gold in Tokyo.

Ethiopian athlete Abebe Bikila runs barefoot for victory in the Rome 1960 Olympic Games marathon, after passing Moroccan Abdeslam Radi, on Sept. 10, 1960. One of the greatest marathon runners ever, Bikila would also win the 1964 Tokyo marathon, the first person to win consecutively,

Another youngster at seventeen, Missy Franklin reacts after winning the women's 100 meter backstroke finals during the London 2012 Olympic Games at Aquatics Centre. Franklin would win four gold and a bronze during the games.

Athletes from Tonga are led by flag bearer Pita Nikolas Taufatofua during the opening ceremonies of the Rio 2016 Summer Olympic Games at Maracana. The moment went viral making the taekwondo athlete Taufatofua a sensation. He would repeat as flag bearer, topless, at the Pyeongchang 2018 Winter Olympic Games as a cross country skier.

Eric Moussambani of Equatorial Guinea has the start blocks to himself as the other two entrants in the first heat of the 100 meter freestyle fouled out with false starts at the Sydney International Aquatic Center on Sept. 19, 2000.