A snack bar at the "Borderland Trail", a cross-national circular trail with original GDR border barriers, which once divided Europe as the Iron Curtain, is pictured at the Grenzlandmuseum Eichsfeld, the site of the former inner-German border crossing Duderstadt-Worbis near Teistungen, Germany, August 5, 2019. Picture taken August 5, 2019. REUTERS/Michael Dalder

Razor barbed wire is seen on the new border fence between Mexico and U.S. in Mexicali, Mexico April 4, 2019. REUTERS/Carlos Jasso TPX IMAGES OF THE DAY

The Houses of Parliament are seen through railings, in central London, Britain November 21, 2018. REUTERS/Peter Nicholls

Anchovies are seen after being removed from the boat at the port of Matosinhos in Portugal, May 29, 2018. Picture taken May 29, 2018. To match Special Report OCEANS-TIDE/SARDINES REUTERS/Pedro Nunes

An inmate gestures at the state penitentiary in Canoas, Brazil August 30, 2018. Picture taken August 30, 2018. To match Insight BRAZIL-ELECTION/BOLSONARO-VIOLENCE REUTERS/Diego Vara TPX IMAGES OF THE DAY

Locks hang at Gorky park in Minsk, Belarus March 30, 2018. REUTERS/Vasily Fedosenko

A man is seen riding a horse, from a fence of a train track, in Til Til, Chile, August 6, 2017. REUTERS/Ivan Alvarado SEARCH "TIL TIL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

An apron hanging at the entrance of a private home says "March 8. I'll stop" in reference to a feminist strike, before Thursday International Women's Day in La Fresneda, Spain, March 7, 2018. REUTERS/Eloy Alonso

A car is plugged in at a charging point for electric vehicles in London, Britain, March 6, 2018. REUTERS/Simon Dawson

A charging point for electric vehicles is seen in London, Britain, March 6, 2018. REUTERS/Simon Dawson

Local-bred Pekingese dogs stand in a cage at the compound of a local animal breeder Zhang Lei in Beijing, China, January 11, 2018. Picture taken January 11, 2018. REUTERS/Thomas Peter

A local-bred Pekingese dog stands in a cage at the compound of a local animal breeder Zhang Lei in Beijing, China, January 11, 2018. Picture taken January 11, 2018. REUTERS/Thomas Peter

A guard dog is pictured in a cage at the Forbidden City in central Beijing, China February 12, 2018. Picture taken February 12, 2018. REUTERS/Jason Lee

The Puerto Rican flag is seen on the wall of a class room of a shut-down elementary school, in Toa Baja, Puerto Rico February 5, 2018. REUTERS/Alvin Baez

Dead saffron finch birds are seen in cages, after Peruvian authorities rescued over 500 birds destined for illegal export, in Lima, Peru February 1, 2018. REUTERS/Mariana Bazo

Dead saffron finch birds are seen in cages, after Peruvian authorities rescued over 500 birds destined for illegal export, in Lima, Peru February 1, 2018. REUTERS/Mariana Bazo

Tomcat "Findus" looks through a window while canary "Dodo" sits in his cage in Hanau, Germany, January 22, 2018. Picture taken January 22, 2018. REUTERS/Kai Pfaffenbach

Tomcat "Findus" looks through a window while canary "Dodo" sits in his cage in Hanau, Germany, January 22, 2018. Picture taken January 22, 2018. REUTERS/Kai Pfaffenbach

Tomcat "Findus" looks through a window while canary "Dodo" sits in his cage in Hanau, Germany, January 22, 2018. Picture taken January 22, 2018. REUTERS/Kai Pfaffenbach

Cattle are loaded onto the NADA vessel in the port of Santos, Brazil, December 2, 2017. Picture taken December 2, 2107. REUTERS/Paulo Whitaker

Cattle are seen on the NADA vessel in the port of Santos, Brazil, December 2, 2017. Picture taken December 2, 2107. REUTERS/Paulo Whitaker

Ice and water flow over the Horseshoe Falls in Niagara Falls, Ontario, Canada, January 3, 2018. REUTERS/Aaron Lynett

A Rohingya refugee prays inside a makeshift mosque at the Kutupalong refugee camp near Cox's Bazar, Bangladesh December 15, 2017. REUTERS/Marko Djurica TPX IMAGES OF THE DAY

A cat for sale is seen in a cage at a pet shop in Colombo, Sri Lanka December 6, 2017. REUTERS/Dinuka Liyanawatte TPX IMAGES OF THE DAY

A wreath is placed before the security barriers during a commemoration for late Diyarbakir Bar Association President Tahir Elci on the second anniversary of his death from gunshot wounds, in Sur district in Diyarbakir, Turkey, November 28, 2017. REUTERS/Sertac Kayar

Carnations are attached on the security barriers during a commemoration for late Diyarbakir Bar Association President Tahir Elci on the second anniversary of his death from gunshot wounds, in Sur district in Diyarbakir, Turkey, November 28, 2017. REUTERS/Sertac Kayar

Carnations are laid behind the security barriers during a commemoration for late Diyarbakir Bar Association President Tahir Elci on the second anniversary of his death from gunshot wounds, in Sur district in Diyarbakir, Turkey November 28, 2017. REUTERS/Sertac Kayar

Debris is seen inside the window of a house left along the valley after the flash flood at Pentagon, Regent town, Sierra Leone August 18, 2017. REUTERS/Afolabi Sotunde TPX IMAGES OF THE DAY

Yozhik, a male Himalayan bear, cools down under a stream of water sprayed by an employee in an enclosure on a hot summer day, with the air temperature at about 34 degrees Celsius (93.2 degrees Fahrenheit), at the Royev Ruchey zoo in Krasnoyarsk, Russia June 21, 2017. REUTERS/Ilya Naymushin TPX IMAGES OF THE DAY

A pig is seen at the International agriculture exhibition "BELAGRO-2017", on the outskirts of Minsk, Belarus June 6, 2017. REUTERS/Vasily Fedosenko TPX IMAGES OF THE DAY

Garbage is seen in front of a floodgate at a canal in Bangkok, Thailand June 6, 2017. REUTERS/Athit Perawongmetha

A sweater of a child hangs on a rope in an abandoned house in western Mosul, Iraq, April 12, 2017. REUTERS/Andres Martinez Casares SEARCH "EMPTY CASARES" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY.

Pigs are seen at a farm in Neihuang county, Henan province, China, September 12, 2016. Picture taken September 12, 2016. REUTERS/Dominique Patton

A uniform placed by family members of police officers demanding better salaries is pictured near the entrance to the military police headquarters in Rio de Janeiro, Brazil February 14, 2017. The sign reads: "Enough". REUTERS/Pilar Olivares

Iraqi teenager Laith Abbas stands inside a reform centre in Dohuk, Iraq, February 12, 2017. Picture taken February 12, 2017. REUTERS/Azad Lashkari

The shadow of a teenager (L) is seen behind a door in a reform centre in Dohuk, Iraq, February 12, 2017. Picture taken February 12, 2017. REUTERS/Azad Lashkari

A man wears a t-shirt of Hillary Clinton behind bars as he eats a sandwich at a rally with Republican U.S. presidential nominee Donald Trump in St. Augustine, Florida, U.S. October 24, 2016. REUTERS/Jonathan Ernst

A man wears a t-shirt of Hillary Clinton behind bars as he eats a sandwich at a rally with Republican U.S. presidential nominee Donald Trump in St. Augustine, Florida, U.S. October 24, 2016. REUTERS/Jonathan Ernst

ATTENTION EDITORS - VISUAL COVERAGE OF SCENES OF INJURY OR DEATH Men pray over dead bodies prior to burial after shelling in the rebel held besieged town of Douma, eastern Ghouta in Damascus, Syria October 24, 2016. REUTERS/Bassam Khabieh

A masked student at the University of the Western Cape flees as police open fire with rubber bullets and teargas during protests demanding free tertiary education in Cape Town, South Africa, October 19, 2016. REUTERS/Mike Hutchings TPX IMAGES OF THE DAY

A masked student at the University of the Western Cape flees as police open fire with rubber bullets and teargas during protests demanding free tertiary education in Cape Town, South Africa, October 19, 2016. REUTERS/Mike Hutchings

A boy walks near a Red Crescent and United Nations aid convoy in the rebel held besieged town of Douma, eastern Ghouta in Damascus, Syria October 19, 2016. REUTERS/Bassam Khabieh

A damaged house is seen after a suspected suicide bomber targeted a wedding celebration in the Turkish city of Gaziantep, Turkey, August 21, 2016. REUTERS/Osman Orsal TPX IMAGES OF THE DAY

Roses are seen on a barrier outside the bar after a fire swept through a bar overnight, killing 13 people and injuring six, after a birthday cake with candles and sparklers fell to the floor and set the carpet ablaze, police said, in Rouen, France, August 6, 2016. REUTERS/Clotaire Achi

A man places roses on a barrier outside the bar after a fire swept through a bar overnight, killing 13 people and injuring six, after a birthday cake with candles and sparklers fell to the floor and set the carpet ablaze, police said, in Rouen, France, August 6, 2016. REUTERS/Clotaire Achi

A lion sleeps inside a cage at the Caricuao Zoo in Caracas, Venezuela July 12, 2016. Picture taken July 12, 2016. REUTERS/Carlos Jasso TPX IMAGES OF THE DAY

A Muslim Brotherhood member laughs behind bars as he gestures with the Rabaa sign, symbolizing support for the Muslim Brotherhood, during the trial of 738 brotherhood members for their armed sit-in at Rabaa square, at a court on the outskirts of Cairo, Egypt May 31, 2016. REUTERS/Amr Abdallah Dalsh

Relatives of some of the 43 missing students of Ayotzinapa College Raul Isidro Burgos take part a protest to demand removal of Director of Criminal Investigations,Tomas Zeron, outside the Attorney General's Office (PGR) headquarters in Mexico City, Mexico May 20, 2016. REUTERS/Henry Romero

Tourists watch actors perform the Romeo and Juliet window scene at the house where William Shakespeare was born during celebrations to mark the 400th anniversary of the playwright's death in Stratford-Upon-Avon, Britain, April 23, 2016. REUTERS/Dylan Martinez

Inmates line up for food provided by the prison in Pavilion No.2 in La Joya prison on the outskirts of Panama City, Panama January 27, 2016. Inmates of La Joya prison on the outskirts of Panama City are housed in makeshift cells amid heavy overcrowding, living in grimy conditions and with limited medical attention. Many prisoners in the Central American nation languish for years without being sentenced. REUTERS/Carlos Jasso SEARCH "PANAMA PRISON" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES TPX IMAGES OF THE DAY

Canadian teacher Neil Bantleman (L) waves beside Indonesian teaching assistant Ferdinand Tjiong to students as they wait inside a holding cell before their trial at a South Jakarta court, Indonesia, April 2, 2015. Indonesia's supreme court has overturned the acquittal of the two teachers, convicted of sexually abusing students at an international Jakarta school and ordered them to serve out their original sentence. Picture taken April 2, 2015. REUTERS/Beawiharta TPX IMAGES OF THE DAY

Family members of inmates clash with police blocking the entrance of the Topo Chico prison in Monterrey, Mexico, February 11, 2016. Fifty-two people were killed and twelve people were wounded in a prison riot in Monterrey in the northeastern Mexican state of Nuevo Leon, governor Jaime Rodriguez said in a news conference on Thursday. REUTERS/Daniel Becerril

A man kicks a police shield as he and other family members of inmates clash with police blocking the entrance of the Topo Chico prison in Monterrey, Mexico, February 11, 2016. Fifty-two people were killed and twelve people were wounded in a prison riot in Monterrey in the northeastern Mexican state of Nuevo Leon, governor Jaime Rodriguez said in a news conference on Thursday. REUTERS/Daniel Becerril

Family members of inmates clash with police blocking the entrance of the Topo Chico prison in Monterrey, Mexico, February 11, 2016. Fifty-two people were killed and twelve people were wounded in a prison riot in Monterrey in the northeastern Mexican state of Nuevo Leon, governor Jaime Rodriguez said in a news conference on Thursday. REUTERS/Daniel Becerril

Family members of inmates react as police block the entrance to the Topo Chico prison in Monterrey, Mexico, February 11, 2016. A battle between rival drug gangs at a prison killed 52 people in the northeastern Mexican city of Monterrey, authorities said on Thursday, days ahead of a planned visit by Pope Francis to another jail in Mexico's far north. REUTERS/Daniel Becerril

A police officer talks to family members of inmates at the entrance of the Topo Chico prison in Monterrey, Mexico, February 11, 2016. A battle between rival drug gangs at a prison killed 52 people in the northeastern Mexican city of Monterrey, authorities said on Thursday, days ahead of a planned visit by Pope Francis to another jail in Mexico's far north. REUTERS/Daniel Becerril

Family members of inmates argue with police at the entrance of the Topo Chico prison in Monterrey, Mexico, February 11, 2016. A battle between rival drug gangs at a prison killed 52 people in the northeastern Mexican city of Monterrey, authorities said on Thursday, days ahead of a planned visit by Pope Francis to another jail in Mexico's far north.REUTERS/Daniel Becerril

A guard stands behind bars at the Adjustment Center during a media tour of California's Death Row at San Quentin State Prison in San Quentin, California December 29, 2015. Picture taken December 29, 2015. REUTERS/Stephen Lam

A boy looks from behind window bars of his house before he received polio vaccine drops in Yemen's capital Sanaa November 9, 2015. According to local media, Yemen started on Monday a three-day house-to-house polio vaccination campaign that aims to target around five million children under five years of age. REUTERS/Khaled Abdullah?

A fisherman from India looks on from behind the bars of his cell at a police station in Karachi, Pakistan, October 5, 2015. According to local media Pakistan maritime authorities arrested 71 Indian fishermen in Pakistani waters and took into custody their twelve boats for illegal fishing in the country's territorial waters, police said on Monday. Picture taken October 5, 2015. REUTERS/Akhtar Soomro