AP
FILE - In this Jan. 6, 2016, file photo, two-time Olympic snowboarder Shaun White trains at Canada Olympic Park in Calgary, Alberta. White says he is working on the tricks that Japan's Ayumu Hirano used to win the Winter X Games last month. Hirano became the first person to string together back-to-back 1440-degree jumps in what was widely regarded as the best show snowboarding has ever put on in a halfpipe. White says he’s working on the back-to-back 1440s, too, and insists the world hasn’t seen his best run yet. (Jeff McIntosh/The Canadian Press via AP, File)
- Jeff McIntosh
South Korean army's armored vehicles move during a military exercise in Paju, South Korea, near the border with North Korea, Wednesday, Feb. 7, 2018. Vice President Mike Pence said the U.S. is preparing to announce the "toughest and most aggressive" economic sanctions against North Korea in the coming days, boosting pressure on the bellicose government during the Winter Olympics. (AP Photo/Ahn Young-joon)
- Ahn Young-joon
FILE - In this April 1, 2016, file photo, Yuzuru Hanyu, of Japan, competes during the free skate program in the World Figure Skating Championships, in Boston. Reigning men’s gold medalist Hanyu will not participate in the team event that opens the figure skating program Friday, Feb. 9, 2018, as he continues to recover from an ankle injury he sustained in November. (AP Photo/Steven Senne, File)
- Steven Senne
FILE - In this April, 23, 2017, file photo, Yuzuru Hanyu of Japan performs during the gale exhibition of the World Team Trophy Figure Skating in Tokyo. Reigning men’s gold medalist Hanyu will not participate in the team event that opens the figure skating program Friday, Feb. 9, 2018, as he continues to recover from an ankle injury he sustained in November. (AP Photo/Shizuo Kambayashi, File)
- Shizuo Kambayashi
FILE - In this Jan. 17, 2015, file photo, Switzerland's Iouri Podladtchikov competes to place fourth at the snowboard halfpipe final at the Freestyle Ski and Snowboard World Championships in Kreischberg, Austria. Defending halfpipe champion Podladtchikov has arrived in Pyeongchang, though his status for next week's contest remains day-to-day. Podladtchikov, known as the I-Pod, broke his nose in a nasty fall at the Winter X Games on Jan 28, 2018. He was taken off the mountain on a stretcher and admitted to the hospital, but scans for brain and neck injuries came back negative. He is expected to go to the mountain, but a spokesperson for the Swiss team says he'll decide day-to-day whether he is going to ride. (AP Photo/Darko Bandic, File)
- Darko Bandic
In this image taken from video footage, North Korean military personnel salute as they lay flowers in front of giant statues of Kim Il Sung and Kim Jong Il on Mansu Hill in central Pyongyang, Thursday, Feb. 8, 2018. North Korea held a military parade and rally on Kim Il Sung Square on Thursday, just one day before South Korea holds the opening ceremony for the Pyeongchang Winter Olympics. (AP Photo)
- TEL
A man sanitizes his hands at the entrance to the media cafeteria in Gangneung, South Korea, Wednesday, Feb. 7, 2018. South Korean authorities deployed 900 military personnel at the Pyeongchang Olympics on Tuesday after the security force was depleted by an outbreak of norovirus. (Paul Chiasson/The Canadian Press via AP)
- Paul Chiasson
FILE - In this Feb. 3, 2018, file photo, wearing an Olympic uniform with the logo OAR - Olympic Athlete from Russia, Russian short track speed skater Ekaterina Efremenkova rounds the track with Canadian skaters during a training session prior to the 2018 Winter Olympics in Gangneung, South Korea. As punishment for doping offenses at the 2014 Sochi Games, the International Olympic Committee has forced Russian athletes competing in Pyeongchang to do so as OARs in neutral uniforms and with no national insignia. (AP Photo/Jae C. Hong, File)
- Jae C. Hong
FILE - In this Jan. 4, 2018, file photo, Adam Rippon performs during the men's short program at the U.S. Figure Skating Championships in San Jose, Calif. Rippon remains open to speaking with Mike Pence over the vice president’s conservative stance on gay rights after the Pyeongchang Olympics. The openly gay Rippon criticized the White House last month for choosing Pence to lead the official U.S. delegation for the Friday, Feb. 9, 2018, opening ceremony. (AP Photo/Marcio Jose Sanchez, File)
- Marcio Jose Sanchez
Olympic Athlete from Russia Anastasia Bryzgalova throws a rock as teammate Aleksandr Krushelnitckii watches during a mixed double curling match against United States' siblings Matt and Becca Hamilton at the 2018 Winter Olympics in Gangneung, South Korea, Thursday, Feb. 8, 2018. (AP Photo/Natacha Pisarenko)
- Natacha Pisarenko
United States' Matt Hamilton sweeps the ice as his teammate and sister Becca watches, during a mixed double curling match against Olympic Athletes from Russia Anastasia Bryzgalova and Aleksandr Krushelnitckii at the 2018 Winter Olympics in Gangneung, South Korea, Thursday, Feb. 8, 2018. (AP Photo/Natacha Pisarenko)
- Natacha Pisarenko
FILE - In this Feb. 5, 2018 file photo, the joint Korean women's ice hockey team head coach Sarah Murray watches her players train prior to the 2018 Winter Olympics in Gangneung, South Korea. Murray said it's important for the players to march together in the opening ceremony to show they are unified. Asked if marching together is a political statement, Murray said putting the team together was a political statement, but now it's just one team. The team has played together just once before, but she says the chemistry is better than she could have imagined. Their first game is Saturday, Feb. 10 against Sweden. (AP Photo/Jae C. Hong, File)
- Jae C. Hong
Norway's Kristin Skaslien watches her teammate Magnus Nedregotten sweep the ice during a mixed double curling match against Canada's Kaitlyn Lawes and John Morris at the 2018 Winter Olympics in Gangneung, South Korea, Thursday, Feb. 8, 2018. (AP Photo/Natacha Pisarenko)
- Natacha Pisarenko
FILE - In this Sept. 25, 2017, file photo, United States Olympic Winter Games luge hopeful Erin Hamlin poses for a portrait at the 2017 Team USA Media Summit in Park City, Utah. Hamlin will carry the U.S. flag into Friday night's opening ceremony at the Pyeongchang Olympics on Feb. 9, 2018. The four-time Olympic luger was chosen by fellow Team USA Olympians for the honor. Hamlin is retiring at the end of these Olympics, after nearly two decades of racing competitively. (AP Photo/Rick Bowmer, File)
- Rick Bowmer
FILE - In this Feb. 3, 2018, file photo, Russian short track speed skater Pavel Sitnikova wears an Olympic uniform with the logo OAR - Olympic Athlete from Russia, during a training session prior to the 2018 Winter Olympics in Gangneung, South Korea. As punishment for doping offenses at the 2014 Sochi Games, the International Olympic Committee has forced Russian athletes competing in Pyeongchang to do so as OARs in neutral uniforms and with no national insignia. (AP Photo/Jae C. Hong, File)
- Jae C. Hong
FILE - In this March 4, 2017, file photo, United States' Lindsey Vonn competes during the women's World Cup downhill at the Jeongseon Alpine Center in Jeongseon, South Korea. The most prized Olympic titles in Alpine skiing will be won this month on downhill courses raced only once before. “I think it's very unique,” said Vonn, who was runner-up in the women’s test race. “There are a lot of elements on the Olympic track that aren't on any World Cup (course).” (AP Photo/Ahn Young-joon, File)
- Ahn Young-joon