A picture shows the the PyeongChang Olympic Stadium, a venue of the PyeongChang 2018 Olympics opening ceremony, in Pyeongchang, South Korea on Dec.28, 2017.( The Yomiuri Shimbun via AP Images )

A picture shows the Olympic cauldron at PyeongChang Olympic Stadium,a venue of the PyeongChang 2018 Olympics opening ceremony, in Pyeongchang, South Korea on Dec.28, 2017.( The Yomiuri Shimbun via AP Images )

PyeongChang Olympic Stadium, Oct 30, 2017 : PyeongChang Olympic Stadium of the 2018 PyeongChang Winter Olympics is seen under construction in PyeongChang, east of Seoul, South Korea. The 23rd Winter Olympics will be held for 17 days from February 9 - 25, 2018. The opening and closing ceremonies and most snow sports will take place in PyeongChang county. Jeongseon county will host Alpine speed events and ice sports will be held in the coast city of Gangneung. (Photo by Lee Jae-Won/AFLO) (SOUTH KOREA)

PyeongChang Olympic Stadium, Oct 30, 2017 : PyeongChang Olympic Stadium of the 2018 PyeongChang Winter Olympics is seen under construction in PyeongChang, east of Seoul, South Korea. The 23rd Winter Olympics will be held for 17 days from February 9 - 25, 2018. The opening and closing ceremonies and most snow sports will take place in PyeongChang county. Jeongseon county will host Alpine speed events and ice sports will be held in the coast city of Gangneung. (Photo by Lee Jae-Won/AFLO) (SOUTH KOREA)

PyeongChang Olympic Stadium, Oct 30, 2017 : PyeongChang Olympic Stadium of the 2018 PyeongChang Winter Olympics is seen under construction in PyeongChang, east of Seoul, South Korea. The 23rd Winter Olympics will be held for 17 days from February 9 - 25, 2018. The opening and closing ceremonies and most snow sports will take place in PyeongChang county. Jeongseon county will host Alpine speed events and ice sports will be held in the coast city of Gangneung. (Photo by Lee Jae-Won/AFLO) (SOUTH KOREA)

PyeongChang Olympic Stadium, Oct 30, 2017 : PyeongChang Olympic Stadium of the 2018 PyeongChang Winter Olympics is seen under construction in PyeongChang, east of Seoul, South Korea. The 23rd Winter Olympics will be held for 17 days from February 9 - 25, 2018. The opening and closing ceremonies and most snow sports will take place in PyeongChang county. Jeongseon county will host Alpine speed events and ice sports will be held in the coast city of Gangneung. (Photo by Lee Jae-Won/AFLO) (SOUTH KOREA)

The Olympic flame holder, Oct 30, 2017 : The Olympic flame holder is seen at PyeongChang Olympic Stadium of the 2018 PyeongChang Winter Olympics in PyeongChang, east of Seoul, South Korea. The 23rd Winter Olympics will be held for 17 days from February 9 - 25, 2018. The opening and closing ceremonies and most snow sports will take place in PyeongChang county. Jeongseon county will host Alpine speed events and ice sports will be held in the coast city of Gangneung. (Photo by Lee Jae-Won/AFLO) (SOUTH KOREA)

PyeongChang Olympic Stadium, Oct 30, 2017 : PyeongChang Olympic Stadium of the 2018 PyeongChang Winter Olympics is seen under construction in PyeongChang, east of Seoul, South Korea. The 23rd Winter Olympics will be held for 17 days from February 9 - 25, 2018. The opening and closing ceremonies and most snow sports will take place in PyeongChang county. Jeongseon county will host Alpine speed events and ice sports will be held in the coast city of Gangneung. (Photo by Lee Jae-Won/AFLO) (SOUTH KOREA)

In this Monday, Oct. 30, 2017, photo, the Pyeongchang Olympic Stadium is under construction in Pyeongchang, South Korea. South Korea's sleepy skiing destination of Pyeongchang is finally looking like a Winter Olympics host city after more than a decade of work, two failed bids, and chapters of controversy over venue locations, construction delays and costs. (AP Photo/Ahn Young-joon)

A photo shows the Olympic flame cauldron at PyeongChang Olympic Stadium in Pyeongchang, South Korea on Oct. 30, 2017. Opening and closing ceremony will be held at this venue. Olympic Games will be held from 9 to 25 February, 2018.( The Yomiuri Shimbun via AP Images )

This aerial photo taken on Aug. 4th, 2018, shows PyeongChang Olympic Stadium under construction in Pyeongchang, South Korea. PyeongChang Olympic Winter Games will be held for 17 days from 9 to 25 February 2018. ( The Yomiuri Shimbun via AP Images )

This aerial photo taken on Aug. 4th, 2018, shows PyeongChang Olympic Stadium under construction in Pyeongchang, South Korea. PyeongChang Olympic Winter Games will be held for 17 days from 9 to 25 February 2018. ( The Yomiuri Shimbun via AP Images )

General view of Pyeongchang Olympic Stadium, FEBRUARY 20, 2016 : in PyeongChang, South Korea. (Photo by YUTAKA/AFLO SPORT)

General view of Pyeongchang Olympic Stadium, FEBRUARY 20, 2016 : in PyeongChang, South Korea. (Photo by YUTAKA/AFLO SPORT)

General view of Pyeongchang Olympic Stadium, FEBRUARY 20, 2016 : in PyeongChang, South Korea. (Photo by YUTAKA/AFLO SPORT)

General view of Pyeongchang Olympic Stadium, FEBRUARY 13, 2016 : in PyeongChang, South Korea. (Photo by YUTAKA/AFLO SPORT)

General view of Pyeongchang Olympic Stadium, FEBRUARY 13, 2016 : in PyeongChang, South Korea. (Photo by YUTAKA/AFLO SPORT)

General view of Pyeongchang Olympic Stadium, FEBRUARY 13, 2016 : in PyeongChang, South Korea. (Photo by YUTAKA/AFLO SPORT)

General view of Pyeongchang Olympic Stadium, FEBRUARY 13, 2016 : in PyeongChang, South Korea. (Photo by YUTAKA/AFLO SPORT)