An official referee shows a white card to confirm a new world record set by Czech free-diver David Vencl in under ice swimming in a lake at a former quarry in the village of Lahost, near the city of Teplice, Czech Republic, February 23, 2021. Vencl swam 80,9 metres under ice on Tuesday without using any support gear, wearing just a swimsuit. REUTERS/David W Cerny

Czech free-diver David Vencl concentrates before breaking the new world record in under-ice swimming in a lake at a former quarry in the village of Lahost near the city of Teplice, Czech Republic, February 23, 2021.Vencl swam 80,9 metres under ice on Tuesday without using any support gear, wearing just a swimsuit. REUTERS/David W Cerny

Czech free-diver David Vencl concentrates before breaking the new world record in under-ice swimming in a lake at a former quarry in the village of Lahost near the city of Teplice, Czech Republic, February 23, 2021. Vencl swam 80,9 metres under ice on Tuesday without using any support gear, wearing just a swimsuit. REUTERS/David W Cerny

Czech free-diver David Vencl reacts after breaking the new world record in under-ice swimming in a lake at a former quarry in the village of Lahost near the city of Teplice, Czech Republic, February 23, 2021. Vencl swam 80,9 metres under ice on Tuesday without using any support gear, wearing just a swimsuit. REUTERS/David W Cerny

Czech free-diver David Vencl reacts after breaking the new world record in under-ice swimming in a lake at a former quarry in the village of Lahost near the city of Teplice, Czech Republic, February 23, 2021. Vencl swam 80,9 metres under ice on Tuesday without using any support gear, wearing just a swimsuit. REUTERS/David W Cerny

Czech free-diver David Vencl reacts after breaking the new world record in under-ice swimming in a lake at a former quarry in the village of Lahost near the city of Teplice, Czech Republic, February 23, 2021. Vencl swam 80,9 metres under ice on Tuesday without using any support gear, wearing just a swimsuit. REUTERS/David W Cerny

Czech free-diver David Vencl reacts after breaking the new world record in under-ice swimming in a lake at a former quarry in the village of Lahost near the city of Teplice, Czech Republic, February 23, 2021. Vencl swam 80,9 metres under ice on Tuesday without using any support gear, wearing just a swimsuit. REUTERS/David W Cerny

Czech free-diver David Vencl reacts after breaking the new world record in under-ice swimming in a lake at a former quarry in the village of Lahost near the city of Teplice, Czech Republic, February 23, 2021. Vencl swam 80,9 metres under ice on Tuesday without using any support gear, wearing just a swimsuit. REUTERS/David W Cerny

Czech free-diver David Vencl reacts after breaking the new world record in under-ice swimming in a lake at a former quarry in the village of Lahost near the city of Teplice, Czech Republic, February 23, 2021. Vencl swam 80,9 metres under ice on Tuesday without using any support gear, wearing just a swimsuit. REUTERS/David W Cerny TPX IMAGES OF THE DAY

Rescue workers stand beside a wreckage of a damaged truck as they search for survivors after a collapse at a marble quarry in Ziarat area of Mohmand, Pakistan September 8, 2020. REUTERS/Stringer

A vending machine and an stone quarry office is seen after floods caused by torrential rain swept through Kumamura, Kumamoto Prefecture, southwestern Japan, July 9, 2020. REUTERS/Kim Kyung-Hoon

A man looks at a destroyed stone quarry where he works at, after floods caused by torrential rain swept through Kumamura, Kumamoto Prefecture, southwestern Japan, July 9, 2020. REUTERS/Kim Kyung-Hoon

A damaged building is covered in debris, at a stone quarry, after floods caused by torrential rain swept through Kumamura, Kumamoto Prefecture, southwestern Japan, July 9, 2020. REUTERS/Kim Kyung-Hoon

A man searches for his belongings in a damaged stone quarry where he works at, after floods caused by torrential rain swept through Kumamura, Kumamoto Prefecture, southwestern Japan, July 9, 2020. REUTERS/Kim Kyung-Hoon

Samira Kabre, 13, and Oumou Kabore, 8, climbs up the pit with crushed stones on thier heads at the Pissy informal granite quarry since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 10, 2020. Picture taken June 10, 2020. REUTERS / Anne Mimault

Melissa Kabore, 4, holds her doll while she walks though the Pissy informal granite quarry, since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

Pascaline Nikiema, 33, carries stones on her head in Pissy informal granite quarry, amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 10, 2020. Picture taken June 10, 2020. REUTERS / Anne Mimault

A woman carries stones out of first rain puddle in Pissy informal granite quarry, amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 10, 2020. Picture taken June 10, 2020. REUTERS / Anne Mimault TPX IMAGES OF THE DAY

Melissa Kabore, 4, holds her doll while she walks though the Pissy informal granite quarry, since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

Abdou Fatao Pafadenam, 11, wraps stone blocks in his t-shirt in Pissy informal granite quarry since schools closed, amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

Children carry stones on their head in Pissy informal granite quarry since schools closed, amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

A young child breaks granite stone at the Pissy informal granite quarry since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 10, 2020. Picture taken June 10, 2020. REUTERS / Anne Mimault

Neimatou Ouedraogo, 9, carries a bucket of water in Pissy informal granite quarry, since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 10, 2020. Picture taken June 10, 2020. REUTERS / Anne Mimault

Samira Kabore, 10, carries stone blocks on his head in Pissy informal granite quarry since schools closed amid the outbreak of the coronavirus disease (COVID-19) in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

Melissa Kabore, 4, stands with her mother in Pissy informal granite quarry, since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

Salamata Sama, 36, feeds her 18-month girl at the Pissy informal granite quarry, amid the outbreak of the coronavirus disease (COVID-19) in Ouagadougou, Burkina Faso June 10, 2020. Picture taken June 10, 2020. REUTERS / Anne Mimault

Ali Nana, 8, plays with friends on used tires in Pissy informal granite quarry, since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

A mother looks at her crying girl in Pissy informal granite quarry, amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

A general view of the Pissy informal granite quarry pit, amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 10, 2020. Picture taken June 10, 2020. REUTERS / Anne Mimault TPX IMAGES OF THE DAY

A child's toy is seen on a rock at the Pissy informal granite quarry since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

Women break stone blocks in Pissy informal granite quarry, amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 10, 2020. Picture taken June 10, 2020. REUTERS / Anne Mimault

Children's feet blacked with the ashes of burned tires are pictured in Pissy informal granite quarry, since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

Oumeima Ouedraogo, 7, crashes stones next to burning tires at the Pissy informal granite quarry since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS / Anne Mimault

Melissa Kabore, 4, jumps over a puddle in Pissy informal granite quarry, since schools closed amid the outbreak of the coronavirus disease (COVID-19), in Ouagadougou, Burkina Faso June 12, 2020. Picture taken June 12, 2020. REUTERS/Anne Mimault TPX IMAGES OF THE DAY

Explosive ordnance disposal (EOD) officers stand in the former quarry that serves as a blast site of the EOD depot of the Hong Kong police during a media tour in Hong Kong, China, December 6, 2019. REUTERS/Thomas Peter

People work at a quarry near the Akamasoa community in Antananarivo, Madagascar, August 27, 2019. Picture taken August 27, 2019. REUTERS/Baz Ratner

A man walks through a quarry near the Akamasoa community in Antananarivo, Madagascar, August 27, 2019. Picture taken August 27, 2019. REUTERS/Baz Ratner TPX IMAGES OF THE DAY

A man breaks stones at a quarry near the Akamasoa community in Antananarivo, Madagascar, August 27, 2019. Picture taken August 27, 2019. REUTERS/Baz Ratner

A woman carries stones at a quarry at near the Akamasoa community in Antananarivo, Madagascar, August 27, 2019. Picture taken August 27, 2019. REUTERS/Baz Ratner

Anti-extradition bill protesters take cover as they face riot police at a Mass Transit Railway (MTR) station at Quarry bay in Hong Kong, China August 11, 2019. REUTERS/Tyrone Siu

Memo and notices are seen placed on "Lennon Walls" by anti-extradition bill protesters at Quarry Bay in Hong Kong, China July 11, 2019. Picture taken July 11, 2019. REUTERS/Tyrone Siu

Labourers work at a stone quarry in south Kashmir's Achabal town November 20, 2018. REUTERS/Danish Ismail

A general view of the Intercontinental Shanghai Wonderland, a hotel built on the site of a former quarry, before its opening to the public, in Shanghai, China November 15, 2018. REUTERS/Aly Song TPX IMAGES OF THE DAY

A man takes pictures from a staircase at the compound of the Intercontinental Shanghai Wonderland, a hotel built on the site of a former quarry, before its opening to the public, in Shanghai, China November 15, 2018. REUTERS/Aly Song TPX IMAGES OF THE DAY

A man takes pictures from a staircase at the compound of the Intercontinental Shanghai Wonderland, a hotel built on the site of a former quarry, before its opening to the public, in Shanghai, China November 15, 2018. REUTERS/Aly Song

Men stand on a platform at the compound of the Intercontinental Shanghai Wonderland, a hotel built on the site of a former quarry, before its opening to the public, in Shanghai, China November 15, 2018. REUTERS/Aly Song

A man sits at an underwater floor of the Intercontinental Shanghai Wonderland, a hotel built on the site of a former quarry, before its opening to the public, in Shanghai, China November 15, 2018. REUTERS/Aly Song

A general view of the Intercontinental Shanghai Wonderland, a hotel built on the site of a former quarry, before its opening to the public, in Shanghai, China November 15, 2018. REUTERS/Aly Song

A general view of the Intercontinental Shanghai Wonderland, a hotel built on the site of a former quarry, before its opening to the public, in Shanghai, China November 15, 2018. REUTERS/Aly Song

A general view of the Intercontinental Shanghai Wonderland, a hotel built on the site of a former quarry, before its opening to the public, in Shanghai, China November 15, 2018. REUTERS/Aly Song

A general view of the Intercontinental Shanghai Wonderland, a hotel built on the site of a former quarry, before its opening to the public, in Shanghai, China November 15, 2018. REUTERS/Aly Song

Local residents are seen in a disused sandstone quarry near the village of Sirohi in the northern state of Haryana, India, October 29, 2018. Picture taken October 29, 2018. REUTERS/Alasdair Pal

Irshad Zakir Khan poses for a photograph in a disused sandstone quarry where he used to work, near the village of Sirohi in the northern state of Haryana, India, October 29, 2018. Pictures taken October 29, 2018. REUTERS/Alasdair Pal

A view of a disused sandstone quarry is pictured near the village of Sirohi in the northern state of Haryana, India, October 29, 2018. Pictures taken October 29, 2018. REUTERS/Alasdair Pal

Kailash Bidhuri, the founder of a local environmental group Save Aravalli, looks on in a disused sandstone quarry near the village of Sirohi in the northern state of Haryana, India, October 29, 2018. Pictures taken October 29, 2018. REUTERS/Alasdair Pal

Gilles Chauwin, President of the Chemin des Dames association and WW1 enthusiast, poses behind the memorial of the 26th Division, the ÒYankeeÓ Division (so called because it was composed entirely of National Guard units from New England) outside the Froidmont quarry, a 20 kilometers (12 miles) complex network of tunnels which became a refuge for thousands of German, American and French soldiers during the First World War in Braye-en-Laonnois, France, October 29, 2018. Picture taken October 29, 2018. REUTERS/Charles Platiau

Inscriptions left by American soldiers of the 26th Division are seen among 1,000 inscriptions discovered in the Froidmont quarry a 20 kilometers (12 miles) complex network of tunnels which became a refuge for thousands of German, American and French soldiers during the First World War in Braye-en-Laonnois, France, October 29, 2018. Picture taken October 29, 2018. REUTERS/Charles Platiau

A carving representing a dog with a German helmet in seen in the Froidmont quarry, a 20 kilometers (12 miles) complex network of tunnels which became a refuge for thousands of German, American and French soldiers during the First World War in Braye-en-Laonnois, France, October 29, 2018. Picture taken October 29, 2018. REUTERS/Charles Platiau