A firefighter helps a boy stranded in debris following a landslide in Xuyong county, Sichuan province, China December 9, 2018. Picture taken December 9, 2018. China Daily via REUTERS

People react after a shooting at Catholic cathedral in Campinas, Brazil December 11, 2018.

A girl stands outside her one-room home in Medina neighbourhood, Dakar, Senegal, December 11, 2018.

A diver dressed as Santa Claus feeds a zebra shark inside a fish tank at the Malta National Aquarium in Qawra, Malta December 12, 2018.

Annegret Kramp-Karrenbauer waves next to German Chancellor Angela Merkel after being elected as the party leader during the Christian Democratic Union (CDU) party congress in Hamburg, Germany, December 7, 2018.

Migrants from Honduras, part of a caravan of thousands from Central America trying to reach the United States, try to climb over a border fence to cross illegally into the U.S., in Tijuana, Mexico, December 11, 2018.

Candles burn, as activists gather at a rally, calling for the release of imprisoned Reuters journalists Wa Lone and Kyaw Soe Oo, one year after they were arrested, in Yangon, Myanmar December 12, 2018.

A woman is sprayed with teargas by the riot police officer during the "yellow vests" protest against higher fuel prices, in Brussels, Belgium, December 8, 2018. REUTERS/Yves Herman

A healthcare worker sprays a room during a funeral of a person who is suspected of dying of Ebola in Beni, North Kivu Province of Democratic Republic of Congo, December 9, 2018.

Michael Cohen, U.S. President Donald Trump's former attorney, arrives for his sentencing at United States Court house in the Manhattan borough of New York City, New York, U.S., December 12, 2018.

Air force officers throw their caps in the air, as they celebrate after their graduation ceremony, at the Brazilian Air Force Academy (AFA) in Pirassununga, Brazil December 7, 2018.

Students of Santa Claus school attend their classes in Sao Paulo, Brazil December 4, 2018. Picture taken December 4, 2018.

Pro-Brexit and anti-Brexit demonstrators shout at each other opposite the Houses of Parliament, in Westminster, central London, Britain December 11, 2018.

People stand at the Trocadero square near the Eiffel Tower in Paris, France, December 12, 2018.

The flag-draped casket of former President George H.W. Bush passes through Magnolia, Texas, Thursday, Dec. 6, 2018, along the route from Spring to College Station, Texas. David J. Phillip/Pool via REUTERS

U.S. President Donald Trump speaks next to Vice President Mike Pence (2ndL) while meeting with Senate Democratic Leader Chuck Schumer (D-NY) and House Democratic Leader Nancy Pelosi (D-CA) at the White House in Washington, U.S., December 11, 2018. Reuters/Kevin Lamarque

British volunteer Paul Barton plays piano for sick, abused, retired and rescued elephants in sanctuary along Thailand-Myanmar border in Kanchanaburi, Thailand, December 9, 2018. Paul has been playing piano for elephants as a volunteer for almost ten years.