Chilean dockworkers clash with riot police during a protest against port operator TPS (South Pacific Terminal), to demand temporary workers be included in collective bargaining, in Valparaiso, Chile on December 18, 2018. (Photo by Rodrigo Garrido/Reuters)





A Chilean dockworker is detained by riot police during a protest against port operator TPS (South Pacific Terminal), to demand temporary workers be included in collective bargaining, in Valparaiso, Chile on December 18, 2018. (Photo by Rodrigo Garrido/Reuters)





A crew member of a cargo ship that ran aground is rescued with the help of a winch system extended from the shore, off the Black Sea coast of Sile, Turkey, Wednesday, December 19, 2018. Turkish coastal safety teams have rescued 16 crew members from the in a dramatic operation that lasted several hours.The Comoros-flagged ship, Natalia, ran aground in rough seas early on Wednesday en route to Istanbul from Russia. (Photo by Akin Celiktas/DHA via AP Photo)





A crew member of a cargo ship that ran aground off the Black Sea coast of Sile, Turkey, is rescued with the help of a winch system extended from the shore, Wednesday, December 19, 2018. (Photo by Akin Celiktas/DHA via AP Photo)





A search and rescue helicopter are seen before a flight to the landing area of the Soyuz MS-09 capsule with the International Space Station (ISS) crew onboard during sunrise in the town of Zhezkazgan, formerly known as Dzhezkazgan, Kazakhstan, Thursday, December 20, 2018. (Photo by Shamil Zhumatov/Pool Photo via AP Photo)





A woman, part of a caravan of thousands from Central America trying to reach the United States, holds a Christmas tree as she walks at the temporary shelter in Tijuana, Mexico on December 19, 2018. (Photo by Carlos Barria/Reuters)





An Ukrainian Army reservist takes part in military exercises at the Ukrainian Army training centre “Desna” in Chernihiv region, Ukraine December 19, 2018. (Photo by Valentyn Ogirenko/Reuters)





Migrants, intercepted off the coast in the Mediterranean Sea, wait to disembark a rescue boat at the port of Malaga, southern Spain on December 18, 2018. (Photo by Jon Nazca/Reuters)





Residents look at the remains of Educandos neighbourhood the day after it was ravaged by a massive fire, in Manaus, Amazonas state, Brazil on December 18, 2018. A huge fire blazed through 600 wooden homes built on stilts next to a river in Brazil's Amazon region overnight, decimating a poor area of the city of Manaus but causing no deaths. An initial investigation suggests a pressure cooker on a stove started the fire, which rapidly spread, fanned by strong gusts of wind at the time, authorities said. (Photo by Michael Dantas/AFP Photo)





Former first lady Michelle Obama, left, is interviewed by Sarah Jessica Parker during an appearance for her book, “Becoming: An Intimate Conversation with Michelle Obama” at Barclays Center on Wednesday, December 19, 2018, in New York. (Photo by Frank Franklin II/AP Photo)





Meghan, The Duchess of Sussex, greets head chef Stuart Jones as she visits the Royal Variety Charity's residential nursing and care home Brinsworth House, in West London, United Kingdom on December 18, 2018. (Photo by Geoff Pugh/Pool via Reuters)





Miss Universe 2018 Catriona Gray of the Philippines waves to her supporters as she arrives at the Manila Internatinal airport in Manila on December 19, 2018. (Photo by Noel Celis/AFP Photo)





EU Commissioner for Competition Margrethe Vestager (L) and EU Research, Science and Innovation Commissioner Carlos Moedas (R) laugh together prior to the EU Commissioners weekly college meeting at The European Commission headquarters in Brussels, on December 19, 2018. (Photo by Aris Oikonomou/AFP Photo)





Freedivers pose with an ornamental Christas tree near the surface before diving to place it on the sea-floor off the coast of the northern Lebanese port city of Tripoli on December 18, 2018. (Photo by Ibrahim Chalhoub/AFP Photo)





Pakistani Christians attend the candle light Carol service during the Christmas celebration in Lahore on December 19, 2018. (Photo by Arif Ali/AFP Photo)





Performers rehearse during a photo call before the opening night of Circus 1903, which features lifesize elephants created by the puppeteers behind War Horse in London, UK on December 19, 2018. (Photo by Dominic Lipinski/PA Wire Press Association)





People visit the “Shining a light on species” exhibition in the Jardin de plantes garden in Paris, France, December 18, 2018. (Photo by Gonzalo Fuentes/Reuters)





A man stands next to his dyed donkey, in Tijuana, Mexico December 19, 2018. (Photo by Mohammed Salem/Reuters)





Mini-pigs perform during the presentation in Balashikha, Russia on December 19, 2018. (Photo by Maxim Shemetov/Reuters)