In this Sunday, Feb. 25, 2018, photo provided by South Korea Presidential Blue House via Yonhap News Agency, South Korean President Moon Jae-in, right, shakes hands with Kim Yong Chol, vice chairman of North Korea's ruling Workers' Party Central Committee, during the closing ceremony of the 2018 Winter Olympics in Pyeongchang, South Korea. (South Korea Presidential Blue House/Yonhap via AP)

Performers stand in formation on the circumference of the Olympic rings during the closing ceremony of the 2018 Winter Olympics in Pyeongchang, South Korea, Sunday, Feb. 25, 2018. (AP Photo/Charlie Riedel)

A closing ceremony of the PyeongChang Olympic Winter Games is held at the Olympic Stadium in Pyeongchang, South Korea, on Feb. 25, 2018, after 17 days of hard-fought competition.( The Yomiuri Shimbun via AP Images )

Canadian athletes embrace as they walk into the stadium during the closing ceremony of the 2018 Winter Olympics in Pyeongchang, South Korea, Sunday, Feb. 25, 2018. (AP Photo/Chris Carlson)

North and South Koreans wave flags during the closing ceremony of the 2018 Winter Olympics in Pyeongchang, South Korea, Sunday, Feb. 25, 2018. (AP Photo/Natacha Pisarenko), APTOPIX

Performers act out a scene during the closing ceremony of the 2018 Winter Olympics in Pyeongchang, South Korea, Sunday, Feb. 25, 2018. (AP Photo/Michael Probst)

German athletes walk into the stadium during the closing ceremony of the 2018 Winter Olympics in Pyeongchang, South Korea, Sunday, Feb. 25, 2018. (AP Photo/Michael Probst)

Performers dance during the closing ceremony of the 2018 Winter Olympics in Pyeongchang, South Korea, Sunday, Feb. 25, 2018. (AP Photo/Charlie Riedel)

From left, Alexander Bolshunov, silver, of the team from Russia, Iivo Niskanen, of Finland, gold, and Andrey Larkov, of the team from Russia, bronze, attend the medals ceremony for the men's 50k cross-country skiing at the closing ceremony of the 2018 Winter Olympics in Pyeongchang, South Korea, Sunday, Feb. 25, 2018. (AP Photo/Charlie Riedel)

South Korean President Moon Jae-in, front row fourth from right, his wife, Kim Jung-sook, and Ivanka Trump, U.S. President Donald Trump's daughter, watch the closing ceremony of the 2018 Winter Olympics along with Kim Yong Chol, back row right, vice chairman of North Korea's ruling Workers' Party Central Committee, in Pyeongchang, South Korea, Sunday, Feb. 25, 2018. (AP Photo/Aaron Favila)

Chen Jining mayor of Beijing takes the Olympic flag from Thomas Bach, president of the International Olympic Committee during the closing ceremony of the 2018 Winter Olympics in Pyeongchang, South Korea, Sunday, Feb. 25, 2018. (AP Photo/Kirsty Wigglesworth)

Chen Jining, mayor of Beijing waves the Olympic flag as Thomas Bach, president of the International Olympic Committee watches during the closing ceremony of the 2018 Winter Olympics in Pyeongchang, South Korea, Sunday, Feb. 25, 2018. (AP Photo/Michael Probst), APTOPIX

Ivanka Trump, daughter of U.S. President Donald Trump, watches the closing ceremony of the 2018 Winter Olympics in Pyeongchang, South Korea, Sunday, Feb. 25, 2018. (AP Photo/Patrick Semansky, Pool)

Ivanka Trump, daughter of U.S. President Donald Trump, departs following the closing ceremony of the 2018 Winter Olympics in Pyeongchang, South Korea, Sunday, Feb. 25, 2018. (AP Photo/Patrick Semansky, Pool)

Ivanka Trump, front left, U.S. President Donald Trump's daughter and Kim Yong Chol, vice chairman of North Korea's ruling Workers' Party Central Committee, right, watch the closing ceremony of the 2018 Winter Olympics in Pyeongchang, South Korea, Sunday, Feb. 25, 2018. (AP Photo/Natacha Pisarenko)

Ivanka Trump, U.S. President Donald Trump's daughter applauds during the closing ceremony of the 2018 Winter Olympics in Pyeongchang, South Korea, Sunday, Feb. 25, 2018. At rear right is Kim Yong Chol, vice chairman of North Korea's ruling Workers' Party Central Committee. (AP Photo/Natacha Pisarenko)

Performers take part in the closing ceremony of the Pyeongchang Winter Olympics in South Korea on Feb. 25, 2018. (Kyodo) ==Kyodo

Fireworks light up the sky and a message saying "See you again" in different languages is displayed in the stands during the closing ceremony of the Winter Olympics in Pyeongchang, South Korea, on Feb. 25, 2018. (Kyodo) ==Kyodo

The Olympic cauldron is seen after the flame was extinguished during the closing ceremony of the Pyeongchang Winter Olympics in South Korea on Feb. 25, 2018. (Kyodo) ==Kyodo

A gigantic glittering ball symbolizing the globe appears out of a box during the closing ceremony of the Pyeongchang Winter Olympics in South Korea on Feb. 25, 2018. (Kyodo) ==Kyodo

The Olympic cauldron is seen after the flame was extinguished during the closing ceremony of the Pyeongchang Winter Olympics in South Korea on Feb. 25, 2018. (Kyodo) ==Kyodo

Norway's athletes arrive during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / JAVIER SORIANO

Flagbearers arrive during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Christof STACHE

Russia's athletes arrive during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Florian CHOBLET

Dancers perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / JAVIER SORIANO

Dancers perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / JAVIER SORIANO

General view during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Fran?ois-Xavier MARIT

A turtle is seen during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / JAVIER SORIANO

Fireworks light up the night sky as dancers perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / JAVIER SORIANO

Finland's silver medallist Krista Parmakoski celebrates on the podium during the medal ceremony for the cross country women's 30km mass start classic during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Martin BERNETTI

Finland's silver medallist Krista Parmakoski, Norway's gold medallist Marit Bjoergen and Sweden's bronze medallist Stina Nilsson pose on the podium during the medal ceremony for the cross country women's 30km mass start classic during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / JAVIER SORIANO

Finland's silver medallist Krista Parmakoski, Norway's gold medallist Marit Bjoergen and Sweden's bronze medallist Stina Nilsson celebrate on the podium during the medal ceremony for the cross country women's 30km mass start classic during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Martin BERNETTI

German athletes parade with South Korean and German flags during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / LOIC VENANCE

Russia's silver medallist Alexander Bolshunov, Finland's gold medallist Iivo Niskanen and Russia's bronze medallist Andrey Larkov pose on the podium during the medal ceremony for the cross country men's 50km mass start classic during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / JAVIER SORIANO

German athletes parade with South Korean and German flags during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Jonathan NACKSTRAND

Artists perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Martin BERNETTI

Entertainers perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / WANG Zhao

IOC President Thomas Bach (L) applauds after handing over the Olympic flag to Mayor of Beijing Chen Jining during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / JAVIER SORIANO

Dancers perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Christof STACHE

Mayor of Pyeongchang Sim Jae-guk (L) and the President of the International Olympic Committee Thomas Bach clap as the Mayor of Beijing Chen Jining waves the Olympic flag during the hand over for the 2022 Beijing Winter Olympic Games during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / KAI PFAFFENBACH

General view of the Olympic rings being projected during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Fran?ois-Xavier MARIT

President of the International Olympic Committee Thomas Bach (C) waves the Olympic flag durimng the handing over to the Mayor of Beijing Chen Jining (R) and Mayor of Pyeongchang Sim Jae-guk (L) during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / JAVIER SORIANO

Dancers perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / JAVIER SORIANO

Dancers perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Martin BERNETTI

Dancers perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Martin BERNETTI

Musicians perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / JAVIER SORIANO

Entertainers perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / LOIC VENANCE

General view as fireworks are set off during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Fran?ois-Xavier MARIT

General view as fireworks are set off during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Fran?ois-Xavier MARIT

Artists and a band perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Martin BERNETTI

General view as fireworks are set off during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Fran?ois-Xavier MARIT

Artists perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Martin BERNETTI

Artists perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Martin BERNETTI

Artists perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Martin BERNETTI

General view as the Olympic flame is set off at the end of the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Fran?ois-Xavier MARIT

Artists perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Martin BERNETTI

(L-R) Tonga's Pita Taufatofua, China's Liu Jiayu, USA's Lindsey Vonn, North Korea's Kim Ju Sik, International Olympic Committee president Thomas Bach and South Korea's Yun Sungbin make heart shapes with their fingers during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Jonathan NACKSTRAND

Artists perform during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Martin BERNETTI

The Olympic flame is switched off during the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Martin BERNETTI

Fireworks light up the night sky outside the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / Christof STACHE

US President's daughter and senior White House adviser Ivanka Trump leaves following the closing ceremony of the Pyeongchang 2018 Winter Olympic Games at the Pyeongchang Stadium on February 25, 2018. / AFP PHOTO / POOL / Patrick Semansky

(180225) -- PYEONGCHANG, Feb. 25, 2018 -- Photo shows the performance at the closing ceremony for the 2018 PyeongChang Winter Olympic Games Olympische Spiele Olympia OS at PyeongChang Olympic Stadium, PyeongChang, South Korea, Feb. 25, 2018. ) (SP)OLY-SOUTH KOREA-PYEONGCHANG-CLOSING CEREMONY WangxHaofei PUBLICATIONxNOTxINxCHN

(180225) -- PYEONGCHANG, Feb. 25, 2018 -- Photo shows the medal ceremony for ladies 30km mass start classic of cross-country skiing at the closing ceremony for the 2018 PyeongChang Winter Olympic Games Olympische Spiele Olympia OS at PyeongChang Olympic Stadium, PyeongChang, South Korea, Feb. 25, 2018. ) (SP)OLY-SOUTH KOREA-PYEONGCHANG-CLOSING CEREMONY WangxHaofei PUBLICATIONxNOTxINxCHN

25 Febuary 2018, South Korea, Pyeongchang: Olympics, Closing Ceremony, Olympic stadium: the Olympic delegation of Pakistan (L-R), Turkey, Ukraine, Norway and Mongolia. Photo: Angelika Warmuth/dpa

International Olympic Committee, IOC, President Thomas Bach (L), Ivanka Trump (R), advisor to and daughter of U.S. President Donald Trump, and South Korean President Moon Jae-in (2nd from L) attend a closing ceremony of the PyeongChang Winter Olympic Games at the Olympic Stadium in Pyeongchang, South Korea, on Feb. 25, 2018. ( The Yomiuri Shimbun via AP Images )

(180225) -- PYEONGCHANG, Feb. 25, 2018 -- Athletes join the closing ceremony for the 2018 PyeongChang Winter Olympic Games Olympische Spiele Olympia OS at PyeongChang Olympic Stadium, PyeongChang, South Korea, Feb. 25, 2018. ) (SP)OLY-SOUTH KOREA-PYEONGCHANG-CLOSING CEREMONY LanxHongguang PUBLICATIONxNOTxINxCHN