The V-cableway Terminal of the Jungfrau Railways, a 470 million CHF investment connecting Grindelwald to Maennlichen and Eigergletscher with 2 lifts, is pictured in front of the Eiger mountain during last testings before the opening of the Eiger Express on December 4, amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Grindelwald, Switzerland November 23, 2020. REUTERS/Denis Balibouse

A staff cleans the tracks at the Eigergletscher V-cableway and train station, a 470 million CHF investment connecting Grindelwald to Maennlichen and Eigergletscher with 2 lifts, during last testings before its opening on December 4, amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Grindelwald, Switzerland November 23, 2020. REUTERS/Denis Balibouse

Passengers wearing protective masks wait to board the Jungfraujoch train at the Kleine Scheidegg, amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Grindelwald, Switzerland November 23, 2020. REUTERS/Denis Balibouse

A staff works in the Eigergletscher V-cableway and train station, a 470 million CHF investment connecting Grindelwald to Maennlichen and Eigergletscher with 2 lifts, during last testings before its opening on December 4, amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Grindelwald, Switzerland November 23, 2020. REUTERS/Denis Balibouse

A sign is pictured in front of a gondola of the Eiger Express in the V-cableway Terminal of the Jungfrau Railways, a 470 million CHF investment connecting Grindelwald to Maennlichen and Eigergletscher with 2 lifts, during last testings before its opening on December 4, amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Grindelwald, Switzerland November 23, 2020. REUTERS/Denis Balibouse

A sign is pictured in front of a gondola of the Eiger Express in the V-cableway Terminal of the Jungfrau Railways, a 470 million CHF investment connecting Grindelwald to Maennlichen and Eigergletscher with 2 lifts, during last testings before its opening on December 4, amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Grindelwald, Switzerland November 23, 2020. REUTERS/Denis Balibouse

The V-cableway Terminal of the Jungfrau Railways, a 470 million CHF investment connecting Grindelwald to Maennlichen and Eigergletscher with 2 lifts, is pictured in front of the Eiger mountain during last testings before the opening of the Eiger Express on December 4, amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Grindelwald, Switzerland November 23, 2020. REUTERS/Denis Balibouse

The V-cableway Terminal of the Jungfrau Railways, a 470 million CHF investment connecting Grindelwald to Maennlichen and Eigergletscher with 2 lifts, is pictured in front of the Eiger mountain during last testings before the opening of the Eiger Express on December 4, amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Grindelwald, Switzerland November 23, 2020. REUTERS/Denis Balibouse

The Eigergletscher V-cableway and train station, a 470 million CHF investment connecting Grindelwald to Maennlichen and Eigergletscher with 2 lifts, is pictured during last testings before the opening of the Eiger Express on December 4, amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Grindelwald, Switzerland November 23, 2020. REUTERS/Denis Balibouse

Staff walk past a sign in the V-cableway Terminal of the Jungfrau Railways, a 470 million CHF investment connecting Grindelwald to Maennlichen and Eigergletscher with 2 lifts, during last testings before the opening of the Eiger Express on December 4, amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Grindelwald, Switzerland November 23, 2020. REUTERS/Denis Balibouse

A staff cleans a Jungfrau sign on the Eigergletscher V-cableway station, a 470 million CHF investment connecting Grindelwald to Maennlichen and Eigergletscher with 2 lifts, during last testings before the opening of the Eiger Express on December 4, amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Grindelwald, Switzerland November 23, 2020. REUTERS/Denis Balibouse

A staff takes a selfie near a Jungfrau sign on the Eigergletscher V-cableway station, a 470 million CHF investment connecting Grindelwald to Maennlichen and Eigergletscher with 2 lifts, during last testings before the opening of the Eiger Express on December 4, amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Grindelwald, Switzerland November 23, 2020. REUTERS/Denis Balibouse TPX IMAGES OF THE DAY

A staff stands in front of a gondola of the Eiger Express in the V-cableway EIgergletscher station of the Jungfrau Railways, a 470 million CHF investment connecting Grindelwald to Maennlichen and Eigergletscher with 2 lifts, during last testings before its opening on December 4, amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Grindelwald, Switzerland November 23, 2020. REUTERS/Denis Balibouse

The Eigergletscher V-cableway and train station, a 470 million CHF investment connecting Grindelwald to Maennlichen and Eigergletscher with 2 lifts, is pictured during last testings before its opening on December 4, amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Grindelwald, Switzerland November 23, 2020. REUTERS/Denis Balibouse

A staff stands in front of a gondola of the Eiger Express in the V-cableway Terminal of the Jungfrau Railways, a 470 million CHF investment connecting Grindelwald to Maennlichen and Eigergletscher with 2 lifts, during last testings before its opening on December 4, amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Grindelwald, Switzerland November 23, 2020. REUTERS/Denis Balibouse

A pylon of the V-cableway, a 470 million CHF investment connecting Grindelwald to Maennlichen and Eigergletscher with 2 lifts, is pictured in front of the Eiger mountain during last testings before its opening on December 4, amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Grindelwald, Switzerland November 23, 2020. REUTERS/Denis Balibouse

The Matterhorn is pictured on an autumn day amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Zermatt, Switzerland November 21, 2020. Picture taken November 21, 2020. REUTERS/Denis Balibouse

A cable car is pictured in front of the Matterhorn amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Zermatt, Switzerland November 21, 2020. Picture taken November 21, 2020. REUTERS/Denis Balibouse

The Matterhorn is pictured on an autumn day amid the coronavirus disease (COVID-19) outbreak, in the ski resort of Zermatt, Switzerland November 21, 2020. Picture taken November 21, 2020. REUTERS/Denis Balibouse

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Karl Geiger in action REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Karl Geiger in action REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Karl Geiger reacts after his final jump to finish in second-place REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Marcus Eisenbichler celebrates winning the competition REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Karl Geiger celebrates finishing in second-place REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Karl Geiger celebrates finishing in second-place REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Austria's Daniel Huber celebrates finishing in third place REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Austria's Daniel Huber holds his trophy as he celebrates finishing in third place REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Austria's Daniel Huber holds his trophy as he celebrates finishing in third place REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Marcus Eisenbichler holds his trophy as he celebrates winning REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Marcus Eisenbichler holds his trophy as he celebrates winning with second-placed Germany's Karl Geiger REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Marcus Eisenbichler celebrates winning on the podium with second-placed Germany's Karl Geiger and third-placed Austria's Daniel Huber REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Austria's Daniel Huber reacts after his jump REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Marcus Eisenbichler reacts after his jump REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Marcus Eisenbichler in action REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Austria's Daniel Huber in action REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Austria's Daniel Huber reacts after his jump REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Norway's Halvor Egner Granerud reacts after his jump REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Japan's Yukiya Sato reacts after his jump REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Japan's Yukiya Sato reacts after his jump REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Poland's Dawid Kubacki reacts after his jump REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Poland's Dawid Kubacki in action REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Austria's Philipp Aschenwald reacts after his jump REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Canada's Mackenzie Boyd-Clowes reacts after his jump REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Austria's Michael Hayboeck reacts after his jump REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Severin Freund reacts after his jump REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Norway's Anders Haare in action REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Norway's Anders Haare in action REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Norway's Anders Haare reacts after his jump REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Martin Hamann crashes REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Martin Hamann crashes REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Martin Hamann crashes REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Martin Hamann crashes REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Japan's Keiichi Sato in action REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Japan's Junshiro Kobayashi in action REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Norway's Marius Lindvik in action REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 General view of the moon during the competition REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 General view of the moon during the competition REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Austria's Stefan Kraft in action REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Germany's Karl Geiger in action REUTERS/Kacper Pempel

Ski Jumping - Ski Jumping World Cup - Wisla, Poland - November 22, 2020 Austria's Stefan Kraft in action REUTERS/Kacper Pempel