Gymnastics: Team USA and Simone Biles take team gold

U.S. women's gymnastics team Shannon Miller_00011308.jpg

Shannon Miller: Biles the real deal, not just hype

01:29

Now playing

- Source: CNN

rio olympic athletes routines natpkg_00021721.jpg

Olympic champions go over their routines

02:26

Now playing

- Source: CNN

Brazil celebrates Olympic gold in men's football

01:34

Now playing

- Source: CNN

Rio Olympics 2016: Why all the empty seats?

01:30

Now playing

- Source: CNN

olympics twins finish marathon holding hands_00000914.jpg

Olympic twins rebuked for finishing race holding hands

00:46

Now playing

- Source: CNN

U.S. gymnast Simone Biles won a record-tying four gold medals and one bronze as she dazzled the crowd with a mix of elegance and athleticism rarely seen in the sport.

Simone Biles wins fourth gold in Rio Olympics

00:54

Now playing

- Source: CNN

olympic branding darlington pkg_00010310.jpg

Where is the brand competition at the Olympics?

02:28

Now playing

- Source: CNN

Olympics Tommie Smith reflections_00015603.jpg

Tommie Smith reflects on the 1968 Olympics

02:01

Now playing

- Source: CNN

Jamaica's Usain Bolt (C) jokes with Canada's Andre De Grasse (L) after they crossed the finish line in the Men's 200m Semifinal during the athletics event at the Rio 2016 Olympic Games at the Olympic Stadium in Rio de Janeiro on August 17, 2016. / AFP / OLIVIER MORIN (Photo credit should read OLIVIER MORIN/AFP/Getty Images)

Usain Bolt cracks joke crossing finish line

00:59

Now playing

- Source: CNN

European Olympic Committee (EOC) President Patrick Hickey gives a press conference after the EOC's 37th general assembly in Istanbul on November 22, 2008. AFP

European Olympic head arrested in alleged ticket scam

01:02

Now playing

- Source: CNN

simone biles zac efron kiss video moos pkg erin_00001612.jpg

See Simone Biles get a kiss from celebrity crush

01:58

Now playing

- Source: CNN

RIO DE JANEIRO, BRAZIL - AUGUST 08: Kerri Walsh Jennings of United States celebrates during the Women's Beach Volleyball preliminary round Pool C match against Fan Wang and Yuan Yue of China on Day 3 of the Rio 2016 Olympic Games at the Beach Volleyball Arena on August 8, 2016 in Rio de Janeiro, Brazil. (Photo by Ezra Shaw/Getty Images)

Kerri Wash Jennings dominates olympic beach volleyball

01:48

Now playing

- Source: CNN

RIO DE JANEIRO, BRAZIL - AUGUST 16: Giles Scott of Great Britain celebrates winning the gold medal in the Finn class on Day 11 of the Rio 2016 Olympic Games at the Marina da Gloria on August 16, 2016 in Rio de Janeiro, Brazil. (Photo by Clive Mason/Getty Images)

British sailing gold medalist talks Rio Olympics

03:09

Now playing

- Source: CNN

south africa sprinter van niekerk riddell dnt_00030201.jpg

South African stuns the world at Rio Olympics

03:05

Now playing

- Source: CNN

olympics yulia efimova walsh intv_00005511.jpg

Yulia Efimova: America has changed me

03:13

Now playing

- Source: CNN

RIO DE JANEIRO, BRAZIL - AUGUST 08: Ibtihaj Muhammad of the United States looks on during the Women's Individual Sabre on Day 3 of the Rio 2016 Olympic Games at Carioca Arena 3 on August 8, 2016 in Rio de Janeiro, Brazil. (Photo by Patrick Smith/Getty Images)

Muslim-American athelete makes history at the Olympics

01:59

Now playing

- Source: CNN

China's Fu Yuanhui poses with her bronze medal on the podium of the Women's 100m Backstroke during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 8, 2016. / AFP / GABRIEL BOUYS (Photo credit should read GABRIEL BOUYS/AFP/Getty Images)

Chinese swimmer praised for challenging taboo

01:05

Now playing

- Source: CNN

Olympics Rio Michael Phelps career_00004215.jpg

Michael Phelps cements Olympic legacy in Rio

02:21

Now playing

- Source: CNN

Usain Bolt's smile cracks up the Internet

01:48

Now playing

- Source: CNN

RIO DE JANEIRO, BRAZIL - AUGUST 09: (R to L) Gold Medalists Simone Biles, Gabrielle Douglas, Lauren Hernandez, Madison Kocian and Alexandra Raisman of the United States stand on the podium for the national anthem at the medal ceremony for the Artistic Gymnastics Women's Team Final on Day 4 of the Rio 2016 Olympic Games at the Rio Olympic Arena on August 9, 2016 in Rio de Janeiro, Brazil. (Photo by Alex Livesey/Getty Images)

Heated debate over Olympic podium moment

01:30

Now playing

- Source: CNN

Podium proposal at Rio Olympics

00:48

Now playing

- Source: CNN

BEIJING, CHINA - AUGUST 27: Usain Bolt of Jamaica celebrates after crossing the finish line to win gold in the Men's 200 metres final during day six of the 15th IAAF World Athletics Championships Beijing 2015 at Beijing National Stadium on August 27, 2015 in Beijing, China. (Photo by Cameron Spencer/Getty Images)

Usain Bolt is ...

01:09

Now playing

- Source: CNN

Douglas produced an astonishing showing at the London 2012 Games with a performance which belied her years.

Mom: Online criticism devastated Gabby Douglas

01:38

Now playing

- Source: CNN

Jennifer Bolt Riddell donut _00031920.jpg

Jennifer Bolt: The gold medal mom

03:20

Now playing

- Source: CNN

rio security concerns nick paton walsh_00022022.jpg

Security concerns ahead of Olympics

01:48

Now playing

- Source: CNN

michael phelps 15 years old intv bts_00000804.jpg

15-year-old Michael Phelps: I don't have a normal life

00:59

Now playing

- Source: WJZ

TOPSHOT - USA's Michael Phelps kisses his gold medal on the podium of the Men's 4x100m Freestyle Relay Final during the swimming event at the Rio 2016 Olympic Games at the Olympic Aquatics Stadium in Rio de Janeiro on August 7, 2016. / AFP / GABRIEL BOUYS (Photo credit should read GABRIEL BOUYS/AFP/Getty Images)

Michael Phelps is ...

00:52

Now playing

- Source: CNN

russian olympian darya klishina suspended nr_00004227.jpg

Lone Russian long jumper suspended from Rio games

02:12

Now playing

- Source: CNN

jessica ennis hill heptathlon success intv_00000704.jpg

2012 Heptathlon champion hopes for a repeat in Rio

01:41

Now playing

- Source: CNN

RIO DE JANEIRO, BRAZIL - AUGUST 12: Katie Ledecky of the United States leads the field in the Women's 800m Freestyle Final on Day 7 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 12, 2016 in Rio de Janeiro, Brazil. (Photo by Adam Pretty/Getty Images)

Ledecky crushes rivals, wins gold medal

01:44

Now playing

- Source: CNN

Two Simones earn gold at Olympics

01:15

Now playing

- Source: CNN

US women's soccer team loses to Sweden in Rio

00:50

Now playing

- Source: CNN

rafaela silva favela gold shasta darlington pkg_00001513.jpg

From Favela to Olympic gold

01:42

Now playing

- Source: CNN

RIO DE JANEIRO, BRAZIL - AUGUST 06: Xinyi Chen of China competes in heat four of the Women's 100m Butterfly on Day 1 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on on August 6, 2016 in Rio de Janeiro, Brazil. (Photo by Lars Baron/Getty Images)

Chinese swimmer fails doping test in Rio

00:50

Now playing

- Source: CNN

Brazil pollution source darlington pkg_00002305.jpg

Rio athletes deal with water full of sewage and trash

01:44

Now playing

- Source: CNN

Which nation sent only 2 athletes to Rio?

02:19

Now playing

- Source: CNN

palestinian olympic swimmer Liebermann_00003219.jpg

Olympic dream comes true for Palestinian swimmer

01:37

Now playing

- Source: CNN

Lochte vs. Phelps: An end to a 12-year rivalry

02:24

Now playing

- Source: CNN

RIO DE JANEIRO, BRAZIL - AUGUST 11: Michael Phelps of the United States celebrates winning the Men's 200m Individual Medley Final on Day 6 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 11, 2016 in Rio de Janeiro, Brazil. (Photo by Al Bello/Getty Images)

How do elite athletes conquer their nerves?

01:16

Now playing

- Source: CNN

Who holds the most incredible Olympic record?

00:59

Now playing

- Source: CNN

ledecky team usa 4x200 gold_00002315.jpg

Simone Biles amazes teammates

00:57

Now playing

- Source: CNN

olympic russian swimming president riddell intv_00004103.jpg

Russian swimming head talks Yulia Efimova, doping

03:05

Now playing

- Source: CNN

The water of the diving pool at right appears a murky green as the water polo pool at left appears a greener colour than the previous day during a preliminary round match between United States and France in the Maria Lenk Aquatic Center at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Wednesday, Aug. 10, 2016. (AP Photo/Matt Dunham)

A 2nd Olympic pool in Rio turns green

01:12

Now playing

- Source: CNN

Japan's Uchimura, US' Ledecky thrill fans

01:39

Now playing

- Source: CNN

favela raised gold medalist rafaela silva shasta darlington_00001007.jpg

The favela that raised Brazil's golden girl

01:35

Now playing

- Source: CNN

Discovering the heart of Rio's art scene

06:44

Now playing

- Source: CNN

jessica ennis hill on doping davies intv_00003505.jpg

Heptathlete Jess Ennis-Hill on doping and clean sports

03:17

Now playing

- Source: CNN

kyle chalmers school friends go wild oly orig_00002528.jpg

Aussies go wild for Kyle Chalmers

00:54

Now playing

- Source: CNN

olympics day five walker riddell_00001219.jpg

Day 5 of the Olympics: Finals are heating up

02:52

Now playing

- Source: CNN

olympics sergio garcia macfarlane intv_00014404.jpg

Golf has returned to the Olympics

03:21

Now playing

- Source: CNN

olympics from the slum to gold medalist darlington pkg_00013626.jpg

Brazil's Rafaela Silva wins gold in women's judo

01:37

Now playing

- Source: CNN

RIO DE JANEIRO, BRAZIL - AUGUST 09: Michael Phelps of the United States celebrates winning gold in the Men's 200m Butterfly Final on Day 4 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on August 9, 2016 in Rio de Janeiro, Brazil. (Photo by Phil Walter/Getty Images)

Michael Phelps wins 21st gold medal

01:36

Now playing

- Source: CNN

Rio Olympic medals making orig _00005728.jpg

How they make Olympic medals

01:00

Now playing

- Source: CNN

Pictures of Serena Williams losing today

Serena Williams knocked out of Rio Olympics

00:55

Now playing

- Source: CNN

Majlinda Kelmendi winning gold medal for Kosovo

Judo champ thrills Kosovo with first ever gold medal

02:51

Now playing

- Source: CNN

How fast does an Olympic boxer punch?

03:21

Now playing

- Source: CNN

rio de janeiro king defeats efimova macfarlane interview_00005626.jpg

American Lilly King defeats Russia's Efimova for gold

01:04

Now playing

- Source: CNN

U.S. women's gymnastics team Shannon Miller_00004728.jpg

All eyes on US women's gymnastics team

00:54

Now playing

- Source: CNN

rio de janeiro brazil bolt davies interview_00001803.jpg

Usain Bolt: I will be 'fully accomplished' after Rio

02:36

Now playing

- Source: CNN

Russia supporters look on as a US team member drapes a US flag during the swimming competitions at the 2016 Summer Olympics, Sunday, Aug. 7, 2016, in Rio de Janeiro, Brazil. (AP Photo/Martin Meissner)

Russian athletes booed at Rio Olympics

01:34

Now playing

- Source: CNN

What US Olympic athletes eat to get ready for Rio 2016

00:48

Now playing

- Source: CNN

rio 41 year old gymnast riddell orig natpkg_00002527.jpg

41-year-old gymnast competes in 7th Olympics

01:22

Now playing

- Source: CNN

An overview shows France's Samir Ait Said being stretchered off after being injured while competing in the qualifying for the men's vault event of the Artistic Gymnastics at the Olympic Arena during the Rio 2016 Olympic Games in Rio de Janeiro on August 6, 2016. / AFP / Antonin THUILLIER (Photo credit should read ANTONIN THUILLIER/AFP/Getty Images)

French gymnast breaks leg during vault in Rio

00:54

Now playing

- Source: CNN

U.S. athletes show off their Olympic tattoos

01:07

Now playing

- Source: CNN

Intv Oly Walsh Jennings Intv_00005617.jpg

Beach volleyball star: Olympics are like childbirth

02:29

Now playing

- Source: CNN

Refugee swimmer aims for the Olympics

02:28

Now playing

- Source: CNN

LONDON, ENGLAND - AUGUST 05: Sanya Richards-Ross of the United States celebrates winning gold in the Women's 400m Final on Day 9 of the London 2012 Olympic Games at the Olympic Stadium on August 5, 2012 in London, England. (Photo by Alexander Hassenstein/Getty Images)

Sonya Richards-Ross talks to CNN

05:00

Now playing

- Source: CNN

RIO DE JANEIRO, BRAZIL - AUGUST 01: The sun sets over the Olympic Rings on the Olympic Park on August 1, 2016 in Rio de Janeiro, Brazil. (Photo by Clive Rose/Getty Images)

Russian athletes barred from Paralympic Games

00:46

Now playing

- Source: CNN

rio egypt olympic fencer lee pkg_00012515.jpg

Egyptian fencer chases Olympic history

02:32

Now playing

- Source: CNN

The girl from Ipanema lights torch

01:49

Now playing

- Source: CNN

What the Olympics means to the American athletes

01:19

Now playing

- Source: CNN

Lebanese Trap Champion Ray Bassil gives a thumbs-up sign as she trains for the 2012 Summer Olympic Games in London at a shooting club in Ghadras north of Beirut on July 13, 2012. AFP PHOTO/JOSEPH EID (Photo credit should read JOSEPH EID/AFP/GettyImages)

Meet the world's #1 female trap shooter

01:21

Now playing

- Source: CNN

Meet Ibtihaj Muhammad

01:14

Now playing

- Source: CNN

team usa olympics uniform daily hit newday_00000921.jpg

Team USA Olympic uniforms receive heat on social media

01:30

Now playing

- Source: CNN

rio no go drug land nick paton walsh_00005404.jpg

Inside Rio's no-go drug zone

02:35

Now playing

- Source: CNN

A man disguised as Batman holds a fake Olympic torch reading "Shame" during a protest against suspended president Dilma Rousseff and former president Luiz Inacio Lula Da Silva, at Copacabana beach in Rio de Janeiro, Brazil, on July 31, 2016.
Protesters took to the streets of Brazil on Sunday to demand the final leaving of suspended President Dilma Rousseff or to defend her continuance, just five days before the start of the Rio 2016 Olympic Games. / AFP / TASSO MARCELO (Photo credit should read TASSO MARCELO/AFP/Getty Images)

Beaches, samba and caipirinhas: CNN's Guide to Rio 2016

02:09

Now playing

- Source: CNN

Polluted water and the Zika virus had been the major health concerns in the run-up to the Rio Olympics.

Health concerns overshadow Rio Olympics

03:48

Now playing

- Source: CNN

BIRMINGHAM, ENGLAND - FEBRUARY 21: Kim Collins of St Kitts & Nevis runs in the 60m heats during the Sainsbury's Indoor Grand Prix at the Barclaycard Arena on February 21, 2015 in Birmingham, England. (Photo by Richard Heathcote/Getty Images)

This 40-year-old can run 100m in less than 10 seconds

02:06

Now playing

- Source: CNN

Test-driving through Rio's Olympic venues

02:40

Now playing

- Source: CNN

south korea zika proof olympic uniforms hancocks pkg_00000204.jpg

Team South Korea wears shield against Zika

01:30

Now playing

- Source: CNN

rio olympics helicopter rescue flores pkg_00010307.jpg

Ride along with Rio's aquatic rescue team

01:59

Now playing

- Source: CNN

Hang gliding over Rio

02:19

Now playing

- Source: CNN

Rosa Flores Favela bar Boteco Bar do David_00004119.jpg

Rio favela bar lauded as top culinary destination

01:16

Now playing

- Source: CNN

spc cnn world rugby great britain rugby sevens team_00014205.jpg

Team GB unified in Olympic rugby bid

02:05

Now playing

- Source: CNN

jerusalem ethiopian marathon runner liebermann pkg_00000607.jpg

Beating the odds for the Olympic dream

01:58

Now playing

- Source: CNN

india female wrestlers udas pkg_00005208.jpg

India sends its first female wrestlers to the Olympics

02:33

Now playing

- Source: CNN

First U.S. Olympic Muslim athlete to wear a hijab

02:09

Now playing

- Source: CNN

Iconic Olympics ads through the years

02:15

Now playing

- Source: CNN

American underdog Olympic heroes

02:58

Now playing

- Source: CNN

2016 olympics rio revitalization darlington pkg_00003913.jpg

Rio undergoes facelift in preparation for Olympics

02:17

Now playing

- Source: CNN

brazil rio olympic village opens darlington pkg_00000000.jpg

An inside look at Rio's Olympic Village

01:37

Now playing

- Source: CNN