A participant dressed up in a Gamora costume attends the 2020 Prague Comic Con in Prague, Czech Republic, February 8, 2020. REUTERS/David W Cerny

People walk past a Giant SAD (Seasonal Affective Disorder) installation, named 'The Light Station', inside Southwark Bridge Tunnel in central London, Britain December 18 2018. REUTERS/Henry Nicholls

A person walks past a Giant SAD (Seasonal Affective Disorder) installation, named 'The Light Station', inside Southwark Bridge Tunnel in central London, Britain December 18 2018. REUTERS/Henry Nicholls

People walk past a Giant SAD (Seasonal Affective Disorder) installation, named 'The Light Station', inside Southwark Bridge Tunnel in central London, Britain December 18 2018. REUTERS/Henry Nicholls

Participants of the techno-parade "Zug der Liebe" ("Train of love") dance on a scaffold in the street in Berlin, Germany, August 25, 2018. REUTERS/Michele Tantussi

Participants of the techno-parade "Zug der Liebe" ("Train of love") dance on a street in Berlin, Germany, August 25, 2018. REUTERS/Michele Tantussi

Participants of the techno-parade "Zug der Liebe" ("Train of love") dance on a street in Berlin, Germany, August 25, 2018. REUTERS/Michele Tantussi

Children wear ear protection as they participate in the techno-parade "Zug der Liebe" ("Train of love") dance on a street in Berlin, Germany, August 25, 2018. REUTERS/Michele Tantussi

A Participant of the techno-parade "Zug der Liebe" ("Train of love") with a sign reading "You need power only if you want something evil, for everything else, love is enough", walks on a street in Berlin, Germany, August 25, 2018. REUTERS/Michele Tantussi

Participants of the techno-parade "Zug der Liebe" ("Train of love") walk on a street in Berlin, Germany, August 25, 2018. REUTERS/Michele Tantussi

A Participant of the techno-parade "Zug der Liebe" ("Train of love") walks on a street in Berlin, Germany, August 25, 2018. REUTERS/Michele Tantussi

A Participant of the techno-parade "Zug der Liebe" ("Train of love") walks on a street in Berlin, Germany, August 25, 2018. REUTERS/Michele Tantussi

Crowd is seen arriving at King Abdulaziz Center for World Culture (ITHRA) ahead of Russian theater orchestra The Marilinsky Orchestra held in Saudi for the first time as part of Eid celebrations in Dhahran, Saudi Arabia, June 16, 2018. Picture taken June 16, 2018. REUTERS/Hamad I Mohammed

Russian's Deputy Prime Minister, Olga Golodets, (L) and Cheif Executive Officer of Russian Direct Investment Fund, Kirill Dmitriev (R) arrive at the press center of King Abdulaziz Center for World Culture (ITHRA) ahead of Russian theatre orchestra The Marilinsky Orchestra held in Saudi for the first time as part of Eid celebrations in Dhahran, Saudi Arabia, June 16, 2018. Picture taken June 16, 2018. REUTERS/Hamad I Mohammed

Maestro, Valery Gergiev arrives at the stage for The Marilinsky Orchestra held in Saudi Arabia for the first time as part of Eid celebrations, at King Abdulaziz Center for World Culture (ITHRA) in Dhahran, Saudi Arabia, June 16, 2018. Picture taken June 16, 2018. REUTERS/Hamad I Mohammed

Russian's Deputy Prime Minister, Olga Golodets, (C) and Cheif Executive Officer of Russian Direct Investment Fund, Kirill Dmitriev (R) arrive at the press center of King Abdulaziz Center for World Culture (ITHRA) ahead of Russian theatre orchestra The Marilinsky Orchestra held in Saudi for the first time as part of Eid celebrations in Dhahran, Saudi Arabia, June 16, 2018. Picture taken June 16, 2018. REUTERS/Hamad I Mohammed

Maestro, Valery Gergiev arrives at the stage for The Marilinsky Orchestra held in Saudi Arabia for the first time as part of Eid celebrations, at King Abdulaziz Center for World Culture (ITHRA) in Dhahran, Saudi Arabia, June 16, 2018. Picture taken June 16, 2018. REUTERS/Hamad I Mohammed

Maestro, Valery Gergiev arrives at the stage for The Marilinsky Orchestra held in Saudi Arabia for the first time as part of Eid celebrations, at King Abdulaziz Center for World Culture (ITHRA) in Dhahran, Saudi Arabia, June 16, 2018. Picture taken June 16, 2018. REUTERS/Hamad I Mohammed

Crowd is seen lining up waiting for doors to open at King Abdulaziz Center for World Culture (ITHRA) ahead of Russian theatre orchestra The Marilinsky Orchestra held in Saudi for the first time as part of Eid celebrations in Dhahran, Saudi Arabia, June 16, 2018. Picture taken June 16, 2018. REUTERS/Hamad I Mohammed

Cheif Executive Officer of Russian Direct Investment Fund, Kirill Dmitriev speaks to media during a news conference at King Abdulaziz Center for World Culture (ITHRA) ahead of Russian theater orchestra The Marilinsky Orchestra held in Saudi for the first time as part of Eid celebrations in Dhahran, Saudi Arabia, June 16, 2018. Picture taken June 16, 2018. REUTERS/Hamad I Mohammed

Russian's Deputy Prime Minister, Olga Golodets speaks to media during a news conference at King Abdulaziz Center for World Culture (ITHRA) ahead of Russian theatre orchestra The Marilinsky Orchestra held in Saudi for the first time as part of Eid celebrations in Dhahran, Saudi Arabia, June 16, 2018. Picture taken June 16, 2018. REUTERS/Hamad I Mohammed

Saudi's Minister of Energy, Industry and Minerals Resources, Khalif Al Falih, (R) speaks to media as Russian's Deputy Prime Minister, Olga Golodets, (L) and Cheif Executive Officer of Russian Direct Investment Fund, Kirill Dmitriev (C) look on during a news conference at King Abdulaziz Center for World Culture (ITHRA) ahead of Russian theatre orchestra The Marilinsky Orchestra held in Saudi for the first time as part of Eid celebrations in Dhahran, Saudi Arabia, June 16, 2018. Picture taken June 16, 2018. REUTERS/Hamad I Mohammed

A Saudi journalist takes photos of Russian's Deputy Prime Minister, Olga Golodets during a news conference at King Abdulaziz Center for World Culture (ITHRA) ahead of Russian theater orchestra The Marilinsky Orchestra held in Saudi for the first time as part of Eid celebrations in Dhahran, Saudi Arabia, June 16, 2018. Picture taken June 16, 2018. REUTERS/Hamad I Mohammed

Saudi's Minister of Energy, Industry and Minerals Resources, Khalif Al Falih, (R) speaks to media as Russian's Deputy Prime Minister, Olga Golodets, (L) and Cheif Executive Officer of Russian Direct Investment Fund, Kirill Dmitriev (C) look on during a news conference at King Abdulaziz Center for World Culture (ITHRA) ahead of Russian theatre orchestra The Marilinsky Orchestra held in Saudi for the first time as part of Eid celebrations in Dhahran, Saudi Arabia, June 16, 2018. Picture taken June 16, 2018. REUTERS/Hamad I Mohammed

Saudi's Minister of Energy, Industry and Minerals Resources, Khalif Al Falih speaks to media during a news conference at King Abdulaziz Center for World Culture (ITHRA) ahead of Russian theatre orchestra The Marilinsky Orchestra held in Saudi for the first time as part of Eid celebrations in Dhahran, Saudi Arabia, June 16, 2018. Picture taken June 16, 2018. REUTERS/Hamad I Mohammed

Saudi Majdoleen Mohammed A. Alateeq is seen as she sits in her car which she received today in Riyadh, Saudi Arabia, June 16, 2018. REUTERS/Faisal Al Nasser

Saudi Majdoleen Mohammed A. Alateeq is seen as she sits in her car which she received today in Riyadh, Saudi Arabia, June 16, 2018. REUTERS/Faisal Al Nasser

Saudi Majdoleen Mohammed A. Alateeq checks her car which she received today in Riyadh, Saudi Arabia, June 16, 2018. REUTERS/Faisal Al Nasser

Hanan Iskandar sits on a bike as she waits for her turn to practice riding a motorbike at Harley Davidson dealer in Al Khobar, Saudi Arabia, June 9, 2018. Picture taken June 9, 2018. REUTERS/Hamad I Mohammed

Saudi Doaa Bassem gets ready for her advance motorcycle-riding training at Harley Davidson dealer in Al Khobar, Saudi Arabia, June 9, 2018. Picture taken June 9, 2018. REUTERS/Hamad I Mohammed

Saudi Doaa Bassem (L) and Hanan Iskandar (R) give thumbs up as they sit on a motorbike prior to their advance riding session at Harley Davidson dealer in Al Khobar, Saudi Arabia, June 9, 2018. Picture taken June 9, 2018. REUTERS/Hamad I Mohammed

Saudi Doaa Bassem gives thumbs up as she conducts her advance motorcycle-riding training at Harley Davidson dealer in Al Khobar, Saudi Arabia, June 9, 2018. Picture taken June 9, 2018. REUTERS/Hamad I Mohammed

Saudi Doaa Bassem gets ready to sit on a motorbike for her advance motorcycle-riding training at Harley Davidson dealer in Al Khobar, Saudi Arabia, June 9, 2018. Picture taken June 9, 2018. REUTERS/Hamad I Mohammed

Saudi Doaa Bassem rides a motorbike during her advance motorcycle-riding training at Harley Davidson dealer in Al Khobar, Saudi Arabia, June 9, 2018. Picture taken June 9, 2018. REUTERS/Hamad I Mohammed

Hanan Iskandar rides a bike during her advance bike-riding training at Harley Davidson dealer in Al Khobar, Saudi Arabia, June 9, 2018. Picture taken June 9, 2018. REUTERS/Hamad I Mohammed

Hanan Iskandar (R) rides a bike as she is assisted by her instructor during her advance bike-riding training at Harley Davidson dealer in Al Khobar, Saudi Arabia, June 9, 2018. Picture taken June 9, 2018. REUTERS/Hamad I Mohammed

Hanan Iskandar rides a bike during her advance bike-riding training at Harley Davidson dealer in Al Khobar, Saudi Arabia, June 9, 2018. Picture taken June 9, 2018. REUTERS/Hamad I Mohammed

Hanan Iskandar rides a bike during her advance bike-riding training at Harley Davidson dealer in Al Khobar, Saudi Arabia, June 9, 2018. Picture taken June 9, 2018. REUTERS/Hamad I Mohammed

A child is seen playing with pigeons in the ground of Al-Quba mosque, after morning prayers during the holy month of Ramadan in Madina, Saudi Arabia May 21, 2018. Picture taken May 21, 2018. REUTERS/Hamad I Mohammed TPX IMAGES OF THE DAY

Muslims make their way into Masjid Al-Nabawi for morning prayers during the holy month of Ramadan in Madina, Saudi Arabia May 20, 2018. Picture taken May 20, 2018. REUTERS/Hamad I Mohammed

Muslims make their way into Masjid Al-Nabawi for morning prayers during the holy month of Ramadan in Madina, Saudi Arabia May 20, 2018. Picture taken May 20, 2018. REUTERS/Hamad I Mohammed

Muslims make their way into Masjid Al-Nabawi for morning prayers during the holy month of Ramadan in Madina, Saudi Arabia May 20, 2018. Picture taken May 20, 2018. REUTERS/Hamad I Mohammed

A child is seen playing with pigeons in the ground of Al-Quba mosque, after morning prayers during the holy month of Ramadan in Madina, Saudi Arabia May 21, 2018. Picture taken May 21, 2018. REUTERS/Hamad I Mohammed

A man sells pins with the image of Pope Francisco reading "I love Pope Francisco" in front of the Cathedral at Bolivar square in Bogota, Colombia September 4, 2017. REUTERS/Nacho Doce

A worker uses a vacuum cleaner during the preparations ahead of the visit of Pope Francisco at Simon Bolivar park in Bogota, Colombia September 4, 2017. REUTERS/Nacho Doce

A group dance a Colombian folklore during the preparations ahead visit of Pope Francisco at Simon Bolivar park in Bogota, Colombia September 4, 2017. REUTERS/Nacho Doce

A police officer patrols between chairs where people will attend the mass of Pope Francisco at Simon Bolivar park in Bogota, Colombia September 4, 2017. REUTERS/Nacho Doce

The moon is seen during a partial lunar eclipse is seen in the sky in Rawalpindi, Pakistan August 8, 2017. REUTERS/Faisal Mahmood

Hot air balloons drift through the sky during the 2015 Albuquerque International Balloon Fiesta in Albuquerque, New Mexico, October 4, 2015. REUTERS/Lucas Jackson

Hot air balloons drift through the sky during the 2015 Albuquerque International Balloon Fiesta in Albuquerque, New Mexico, October 4, 2015. REUTERS/Lucas Jackson

Attendees walk by a hot air balloon lit up by flames as it prepares for take off during the 2015 Albuquerque International Balloon Fiesta in Albuquerque, New Mexico, October 4, 2015. REUTERS/Lucas Jackson

Attendees watch as hundreds of hot air balloons lift off on the first day of the 2015 Albuquerque International Balloon Fiesta in Albuquerque, New Mexico, October 3, 2015. REUTERS/Lucas Jackson

Hot air balloons lift off on the first day of the 2015 Albuquerque International Balloon Fiesta in Albuquerque, New Mexico, October 3, 2015. REUTERS/Lucas Jackson

A young boy runs across a field as hundreds of hot air balloons lift off on the first day of the 2015 Albuquerque International Balloon Fiesta in Albuquerque, New Mexico, October 3, 2015. REUTERS/Lucas Jackson

Attendees watch and photograph as hundreds of hot air balloons lift off on the first day of the 2015 Albuquerque International Balloon Fiesta in Albuquerque, New Mexico, October 3, 2015. REUTERS/Lucas Jackson

Contestants prepare themselves ahead of the Miss Gay Jozi pageant (Jozi is slang for Johannesburg) in Johannesburg May 23, 2015. Picture taken May 23, 2015. REUTERS/Siphiwe Sibeko

A woman enters her house, with cranes and construction work for the Rio 2016 Olympic Park seen in the background, at the Vila Autodromo favela in Rio de Janeiro January 28, 2015. Street addresses jump in the Vila Autodromo favela: 39, 42, 48, 51. The missing numbers belonged to homes now reduced to rubble to make way for the Olympic Park in Rio de Janeiro. But 18 months before the Olympic Games begin, about 50 families still refuse to leave, clinging on despite increasing isolation and irregular access to basic services like water and electricity. The land conflict in Vila Autodromo, which feels like a ghost town with 90 percent of its residents gone, shows the underside of Rio's attempt to use the 2016 Olympic Games to modernize the city. Picture taken on January 28, 2015. To match BRAZIL-OLYMPICS/EVICTIONS REUTERS/Ricardo Moraes (BRAZIL - Tags: POLITICS CIVIL UNREST SPORT OLYMPICS SOCIETY)

A man receives a face scrub with a mask after a steam bath at a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

A man receives a face scrub with a mask after a steam bath at a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)

Men take a dip in a cold bath at a traditional steam bath "hammam" in Cairo, September 15, 2014. The "hammam", which was adopted during Turkish rule, is similar to a sauna. Local steam bath culture was recently revived in past years after they were made cleaner, with modern methods of beauty and relaxation introduced. Picture taken September 15, 2014. REUTERS/Asmaa Waguih ? (EGYPT - Tags: SOCIETY)