A hexagon sign reading "Thank you Tegel" is pictured at Tegel Airport, which is expected to shut permanently on November 8, in Berlin, Germany October 22, 2020. REUTERS/Fabrizio Bensch 

A visitor is pictured beside a hexagon sign reading "Thank you Tegel" at Tegel Airport, which is expected to shut permanently on November 8, in Berlin, Germany October 22, 2020. REUTERS/Fabrizio Bensch 

A hexagon sign reading "Thank you Tegel" is pictured at Tegel Airport, which is expected to shut permanently on November 8, in Berlin, Germany October 22, 2020. REUTERS/Fabrizio Bensch 

A demonstrator lies in a hexagonal shape construction as activists from Extinction Rebellion launch a new wave of "civil disobedience" in Berlin, Germany, October 7, 2019. REUTERS/Christian Mang 

A view of the Borgarting appeals court in Oslo, Norway April 24, 2019. REUTERS/Gwladys Fouche 

A man walks past Borgarting appeals court in Oslo, Norway April 24, 2019. REUTERS/Gwladys Fouche 

A Borgarting appeals court sign is seen on the court's building in Oslo, Norway April 24, 2019. REUTERS/Gwladys Fouche 

A Borgarting appeals court sign is seen on the court's building in Oslo, Norway April 24, 2019. REUTERS/Gwladys Fouche 

A Borgarting appeals court sign is seen on the court's building in Oslo, Norway April 24, 2019. REUTERS/Gwladys Fouche 

A man walks past Borgarting appeals court in Oslo, Norway April 24, 2019. REUTERS/Gwladys Fouche 

A view of the Borgarting appeals court in Oslo, Norway April 24, 2019. REUTERS/Gwladys Fouche 

A Borgarting appeals court sign is seen on the court's building in Oslo, Norway April 24, 2019. REUTERS/Gwladys Fouche 

Cans of Cisk Lager are seen on a conveyor belt at the beer packaging facility at Farsons Brewery in Mriehel, Malta June 4, 2018. Picture taken June 4, 2018. REUTERS/Darrin Zammit Lupi 

Lead prosecutor Marianne Bender in Ola Rollen insider trading case trial arrives at the district court in Oslo, Norway October 30, 2017. REUTERS/Gwladys Fouche 

The prosecution team in the Ola Rollen insider trading case trial arrives at the district court in Oslo, Norway October 30, 2017. REUTERS/Gwladys Fouche 

A general view of the district court building where Hexagon CEO Ola Rollen is sitting trial for insider trading, in Oslo, Norway October 30, 2017. REUTERS/Gwladys Fouche 

Ola Rollen, chief executive of the Swedish engineering group Hexagon AB, speaks during a news conference in Zurich, Switzerland, June 13, 2005. REUTERS/Siggi Bucher/File Photo 

Ola Rollen, Chief executive of the Swedish engineering group Hexagon AB gestures during a news conference in Zurich, Switzerland, June 13, 2005. REUTERS/Siggi Bucher/File Photo 

Snooker - Coral Snooker Shoot-Out - The Hexagon, Reading - 14/2/16
Mark Williams in action during the semi final
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Robin Hull in action during the final
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Robin Hull in action during the final
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Robin Hull in action during the final
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Luca Brecel in action during the final
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Robin Hull in action during the final
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Robin Hull celebrates victory with the trophy
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Robin Hull celebrates victory with the trophy
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Robin Hull celebrates victory with the trophy
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Snooker - Coral Snooker Shoot-Out - The Hexagon, Reading - 14/2/16
Andrew Higginson in action
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General view during the shoot out
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Ryan Day in action
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Robin Hull in action
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Andrew Higginson in action
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Robert Milkins in action
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Luca Brecel in action
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Joe Perry in action
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Mark Williams in action
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Ben Woolaston in action
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Indian-born British artist Anish Kapoor is reflected in his artwork ' Hexagon Mirror' (2007) as he poses during a media preview of the exhibtion 'Kapoor in Berlin' at the Martin-Gropius Bau, in Berlin May 17, 2013. The exhibition, which opens to the public on Saturday, will run until November 24. REUTERS/Philippe Wojazer (GERMANY - Tags: ENTERTAINMENT PROFILE) BEST QUALITY AVAILABLE 

Indian-born British artist Anish Kapoor is reflected in his artwork ' Hexagon Mirror' (2007) as he poses during a media preview of the exhibtion 'Kapoor in Berlin' at the Martin-Gropius Bau, in Berlin May 17, 2013. The exhibition, which opens to the public on Saturday, will run until November 24. REUTERS/Philippe Wojazer (GERMANY - Tags: ENTERTAINMENT PROFILE TPX IMAGES OF THE DAY)

Indian-born British artist Anish Kapoor is reflected in his artwork ' Hexagon Mirror' (2007) as he poses during a media preview of the exhibtion 'Kapoor in Berlin' at the Martin-Gropius Bau, in Berlin May 17, 2013. The exhibition, which opens to the public on Saturday, will run until November 24. REUTERS/Philippe Wojazer (GERMANY - Tags: ENTERTAINMENT PROFILE) FOR BEST QUALITY IMAGE ALSO SEE: GF2EA5J1IO001 

Large hexagonal columns of volcanic rock are pictured on Ninepin Group, also known as Kwo Chau Islands, southeast of Hong Kong August 30, 2012. An ancient supervolcano that last erupted 140 million years ago, considered as one of the oldest supervolcanos, has been discovered in the southeastern part of Hong Kong, the Hong Kong Geological Survey under the government's Civil Engineering and Development Department said on Thursday. It added that this is the first discovery of an ancient supervolcano in southeastern China. REUTERS/Bobby Yip (CHINA - Tags: ENVIRONMENT SOCIETY) 

Large hexagonal columns of volcanic rock are pictured on Ninepin Group, also known as Kwo Chau Islands, southeast of Hong Kong August 30, 2012. An ancient supervolcano that last erupted 140 million years ago, considered as one of the oldest supervolcanos, has been discovered in the southeastern part of Hong Kong, the Hong Kong Geological Survey under the government's Civil Engineering and Development Department said on Thursday. It added that this is the first discovery of an ancient supervolcano in southeastern China. REUTERS/Bobby Yip (CHINA - Tags: ENVIRONMENT SOCIETY) 

People fish in a boat off Ninepin Group, also known as Kwo Chau Islands, where large hexagonal columns of volcanic rock are exposed, southeast of Hong Kong, August 30, 2012. An ancient supervolcano that last erupted 140 million years ago, considered as one of the oldest supervolcanos, has been discovered in the southeastern part of Hong Kong, the Hong Kong Geological Survey under the government's Civil Engineering and Development Department said on Thursday. It added that this is the first discovery of an ancient supervolcano in southeastern China. REUTERS/Bobby Yip (CHINA - Tags: ENVIRONMENT SOCIETY) 

Journalists film Ninepin Group, also known as Kwo Chau Islands, where large hexagonal columns of volcanic rock are exposed, southeast of Hong Kong, August 30, 2012. An ancient supervolcano that last erupted 140 million years ago, considered as one of the oldest supervolcanos, has been discovered in the southeastern part of Hong Kong, the Hong Kong Geological Survey under the government's Civil Engineering and Development Department said on Thursday. It added that this is the first discovery of an ancient supervolcano in southeastern China. REUTERS/Bobby Yip (CHINA - Tags: ENVIRONMENT SOCIETY) 

Handcrafted Christmas tree decorations shaped as kilo weight measures are seen at the International Glass Art Center in Meisenthal, North Eastern France, November 22, 2011. A local tradition says the Christmas tree glass balls craftsmanship was invented in the 19th century at the Vergo glass factory in the nearby village of Goetzenbruck and reintroduced at the Glass Art Center since 1998. REUTERS/Vincent Kessler (FRANCE - Tags: SOCIETY BUSINESS) 

Three teams complete during a "Three Sided Football" match in Getxo, near Bilbao October 8, 2011. The game, played on a hexagonal pitch in which the winning team is that which receives the least amount of goals, was devised by Danish Situationist artist Asger Oluf Jorn to explain his Trialectic or three sided logic theories. The event is part of "Thinking Football", a series of activities organised by the Athletic Club foundation that examine the role of football in contemporary society. A thirty seven team championship starting in October will finish in April 2012. REUTERS/Vincent West (SPAIN - Tags: SPORT SOCCER SOCIETY) 

Three teams complete during a "Three Sided Football" match in Getxo, near Bilbao October 8, 2011. The game, played on a hexagonal pitch in which the winning team is that which receives the least amount of goals, was devised by Danish Situationist artist Asger Oluf Jorn to explain his Trialectic or three sided logic theories. The event is part of "Thinking Football", a series of activities organised by the Athletic Club foundation that examine the role of football in contemporary society. A thirty seven team championship starting in October will finish in April 2012. REUTERS/Vincent West (SPAIN - Tags: SPORT SOCCER SOCIETY) 

Doctor Li Tongqiang (C) can be seen through a window as he walks past patients receiving treatment at his medical clinic in the village of Jianhua, located on the outskirts of the northern Chinese city of Shuangcheng in Heilongjiang province March 29, 2011. Li is one of 800 'country' doctors that care for around 600,000 mostly farmers and their families who live in the rural areas surrounding the city of Shuangcheng. Li's annual salary is around 25,000 Yuan (US$3,900), and he sees around 15-20 patients per day, visiting homes of patients if they are unable to visit his clinic. China is in the midst of overhauling the biggest healthcare infrastructure in human history and in the past month, has pledged more money to bring more people under its insurance scheme, raise the levels of reimbursements, and improve services to meet the needs of a 1.33 billion population. Picture taken March 29, 2011. REUTERS/David Gray (CHINA - Tags: HEALTH SOCIETY) 

People try out "Salt Studio" at the Diet and Beauty Fair 2008 in Tokyo August 25, 2008. "Salt Studio" uses hexagon-shaped natural salt tiles on the floor, ceiling, and walls which change colours along with music while the room temperature is set at 41 degrees Celsius (105 degrees Fahrenheit) and humidity at 45 percent. The event runs until August 27. REUTERS/Yuriko Nakao (JAPAN) 

People try out "Salt Studio" at the Diet and Beauty Fair 2008 in Tokyo August 25, 2008. "Salt Studio" uses hexagon-shaped natural salt tiles on the floor, ceiling, and walls which change colours along with music while the room temperature is set at 41 degrees Celsius (105 degrees Fahrenheit) and humidity at 45 percent. The event runs until August 27. REUTERS/Yuriko Nakao (JAPAN) 

People try out "Salt Studio" at the Diet and Beauty Fair 2008 in Tokyo August 25, 2008. "Salt Studio" uses hexagon-shaped natural salt tiles on the floor, ceiling, and walls which change colours along with music while the room temperature is set at 41 degrees Celsius (105 degrees Fahrenheit) and humidity at 45 percent. The event runs until August 27. REUTERS/Yuriko Nakao (JAPAN) 

People fish at the shore of cooling water outlet of Tai Power No. 3 nuclear power station in Kenting April 25, 2008. As Taiwan heats up ahead of the summer, hundreds of beach bums are splashing down at a beach next to a nuclear power plant that spews cooling water straight into the ocean. Picture taken April 25, 2008. REUTERS/Pichi Chuang (TAIWAN) 

Cold drawn steel bars are pictured at a production line at 'Schmolz + Bickenbach' group in Duesseldorf March 12, 2008. 'Schmolz + Bickenbach' group one of the world's largest manufacturers, processors and distributors of special steel long products. REUTERS/Ina Fassbender (GERMANY) 

Cold drawn steel bars are pictured at a production line at 'Schmolz + Bickenbach' group in Duesseldorf March 12, 2008. 'Schmolz + Bickenbach' group one of the world's largest manufacturers, processors and distributors of special steel long products. REUTERS/Ina Fassbender (GERMANY) 

Cold drawn steel bars are pictured at a production line at 'Schmolz + Bickenbach' group in Duesseldorf March 12, 2008. 'Schmolz + Bickenbach' group one of the world's largest manufacturers, processors and distributors of special steel long products. REUTERS/Ina Fassbender (GERMANY) 

A vendor piles used plastic bottles, which will be sold to recycling plants, on the roof of his house in Dhaka January 29, 2007. REUTERS/Rafiqur Rahman (BANGLADESH) 

Wiccan high priestess Gypsy Ravish looks through a hexagram, symbol of solar energy of light, life, love and liberty, at the store Nu Aeon in Salem, Massachusetts, October 25, 2006. Witches of Salem will celebrate the Wiccan new year of Samhain on October 31. REUTERS/Brian Snyder (UNITED STATES) 

Visitors view the 91 hexagonal mirror segments that make up the array of the Southern African Large Telescope (SALT) near Sutherland in South Africa's arid Karoo region November 10,2005. Officially launched by South Africa's President Thabo Mbeki, SALT is the largest telescope in the southern hemisphere. It can probe distant stars and galaxies and shed light on the ancient origins of the universe. REUTERS/Mike Hutchings 

Visitors view the 91 hexagonal mirror segments that make up the array of the Southern African Large Telescope (SALT) near Sutherland in South Africa's arid Karoo region November 10,2005. Officially launched by South Africa's President Thabo Mbeki, SALT is the largest telescope in the southern hemisphere. It can probe distant stars and galaxies and shed light on the ancient origins of the universe. REUTERS/Mike Hutchings 

Hans Hess, Chief Executive of Leica Geosystems, presents a share buy-back programme during a news conference in Zurich. Hans Hess, Chief Executive of Leica Geosystems, presents a share buy-back programme during a news conference in Zurich June 30, 2005. The Swiss measuring equipment maker, target of a takeover bid by Swedish rival Hexagon AB, said it planned to buy back 100 million Swiss francs ($78.5 million) worth of its own shares if the group remained independent. REUTERS/Sebastian Derungs