Swiss police officers stand beside of mock gates of the NEAT Gotthard Base Tunnel inside the event hall for the upcoming opening ceremony near the town of Erstfeld, Switzerland May 31, 2016. The celebrations of the opening of the Gotthard Base Tunnel will start on June 1, 2016. With a length of 57 km (35 miles) crossing the Alps, the Gotthard Base tunnel is the world's longest train tunnel. (Photo by Arnd Wiegmann/Reuters)

A man covered with mineral-rich mud smiles on a bank of lake Tus in Khakassia region, southwest of the Siberian city of Krasnoyarsk, Russia, July 16, 2016. (Photo by Ilya Naymushin/Reuters)

Inmates stand next to food during a Christmas event at Sarita Colonia male prison in Callao, Peru, December 18, 2015. For the event, inmates prepared Christmas meals for a culinary competition and took part in dances and songs. (Photo by Mariana Bazo/Reuters)

A man looks inside an overturned truck after an accident along the road between Nouahibou and Nouakchott, Mauritania December 3, 2009. (Photo by Rafael Marchante/Reuters)

A visitor tries a baccarat game at the Global Gaming Expo (G2E) Asia in Macau, China May 19, 2015. (Photo by Bobby Yip/Reuters)

Lin Yufei and Gao Zijian of China perform in the gala exhibition on day three of the ISU Grand Prix of Figure Skating Cup of China at Huaxi Sports Center on November 8, 2020 in Chongqing, China. (Photo by Carlos Garcia Rawlins/Reuters)

Mammoet Rallysport's Martin Van Den Brink and Co-Driver Wouter De Graaff in action surrounded by camels during stage 10, Neom to AlUla, Saudi Arabia on January 13, 2021. (Photo by Hamad I Mohammed/Reuters)

Policemen escort a Femen activist who broke into a rally of Franco's dictatorship regimen followers in Madrid, Spain, 28 March 2021. (Photo by Zipi/EPA/EFE)