Poppies are seen in full bloom during spring in Aleppo governorate, Syria April 14, 2019. Picture taken April 14, 2019.

Trees are lit by a flame in the Yarakta Oil Field, owned by Irkutsk Oil Company (INK), in Irkutsk Region, Russia March 11, 2019. Picture taken March 11, 2019.

Venezuelan migrants wait while the rubbish truck unload at the garbage dump in the border city of Pacaraima, Brazil April 13, 2019. Picture taken April 13, 2019.

Migrants from Central America walk along a road during their journey towards the United States, in Tuzantan, Mexico April 16, 2019.

Workers of Venezuelan Red Cross distribute humanitarian aid in the form of water containers and water purification pills in the Agua Salud neighbourhood in Caracas, Venezuela, April 16, 2019.

Western lowland gorilla Fatou eats a hard-boiled Easter Egg during a media event at the Zoo in Berlin, Germany, April 16, 2019. REUTERS/Fabrizio Bensch TPX IMAGES OF THE DAY - RC167A3AF7C0

Servicemen of an Interior Ministry's special division take an examination to gain the right to join the ministry's "Maroon Berets" elite unit near the village of Valowshchyna, Belarus April 16, 2019.

Tulips bloom in front of the White House in Washington, U.S., April 16, 2019.

Police confront students as they take part in a protest seeking the departure of the ruling elite in Algiers, Algeria April 16, 2019.

A Sudanese demonstrator makes victory sign as she protests outside Defence Ministry in Khartoum, Sudan April 16, 2019. REUTERS/Umit Bektas - RC1E84947120

Officials carry election materials on a raft in a flooded area to be distributed in Bandung, West Java province, Indonesia, April 16, 2019 in this photo taken by Antara Foto. Antara Foto/Raisan Al Farisi/via REUTERS

Interior view of Notre-Dame de Paris in the aftermath of a fire that devastated the cathedral, during the visit of French Interior Minister Christophe Castaner (not pictured) in Paris, France, April 16, 2019.

People gather near a statue of the Virgin Mary at the Place Saint-Michel the day after Notre-Dame Cathedral suffered heavy damage from a massive fire that devastated large parts of the gothic structure in Paris, France, April 16, 2019. REUTERS/Gonzalo Fuentes - RC1CA0E23E00

Swedish environmental activist Greta Thunberg cries at the end of her speech to the environment committee of the European Parliament in Strasbourg, April 16, 2019.

A woman prays next to Notre Dame Cathedral after it suffered heavy damage from a fire, in Paris, France April 15, 2019.

Police officers detain a climate change activist at Waterloo Bridge during the Extinction Rebellion protest in London, Britain April 16, 2019. REUTERS/Peter Nicholls

People hold up photos of anti-corruption journalist Daphne Caruana Galizia during a protest marking eighteen months since her assassination, outside the office of Prime Minister Joseph Muscat at Auberge de Castille in Valletta, Malta April 16, 2019.

MiG-29 fighter jets of Unit 1017 of the Korean People's Army Air, Anti-Air Force fly during a flight traning at undisclosed location in this April 16, 2019 photo released on April 17, 2019 by North Korea's Central News Agency (KCNA).

An employee looks on at the assembly line of Gorkovsky Automobile Plant (GAZ) in Nizhny Novgorod, Russia April 16, 2019.

Brexit campaigner and Member of the European Parliament Nigel Farage arrives to attend a debate on the outcome of the latest European Summit on Brexit, at the European Parliament in Strasbourg, France, April 16, 2019.

Sudanese demonstrators try to beat a man who they think is a government agent, as soldiers try to take him out of the crowd in Khartoum, Sudan April 16, 2019.