A Central American migrant is stopped by U.S. agents who order him to go back to the Mexican side of the border, after a group of migrants got past Mexican police at the Chaparral crossing in Tijuana, Mexico, Sunday, November 25, 2018, at the border with San Ysidro, California. The mayor of Tijuana has declared a humanitarian crisis in his border city and says that he has asked the United Nations for aid to deal with the approximately 5,000 Central American migrants who have arrived in the city. (Photo by Pedro Acosta/AP Photo)





A migrant, part of a caravan of thousands from Central America trying to reach the United States, wears a homemade gasmask as he walks near the border fence between Mexico and the United States in Tijuana, Mexico, November 25, 2018. (Photo by Hannah McKay/Reuters)





A migrant family, part of a caravan of thousands traveling from Central America en route to the United States, run away from tear gas in front of the border wall between the U.S and Mexico in Tijuana, Mexico November 25, 2018. (Photo by Kim Kyung-Hoon/Reuters)





A Honduran migrant converses with U.S border agents on the other side of razor wire after they fired tear gas at migrants pressuring to cross into the U.S. from Tijuana, Mexico, Sunday, November 25, 2018. The mayor of Tijuana has declared a humanitarian crisis in his border city and says that he has asked the United Nations for aid to deal with the approximately 5,000 Central American migrants who have arrived in the city. (Photo by Ramon Espinosa/AP Photo)





Mexico's Federal Police try to grab migrants, part of a caravan of thousands from Central America, as they attempt to cross the border into the United States from Tijuana, Mexico on November 26, 2018. (Photo by Adrees Latif/Reuters)





A statue of German philosopher Immanuel Kant splattered with paint, near one of the buildings of Immanuel Kant Baltic Federal University in the city of Kaliningrad (formerly known as Konigsberg), Russia on November 27, 2018. (Photo by Vitaly Nevar/TASS)





Tunisians demonstrate with saws, placards reading 'You are not welcomed' and showing Saudi Crown Prince Mohammed bin Salman, Tuesday November.27, 2018 in Tunis. Amid international concern about the killing of Saudi journalist Jamal Khashoggi, some 200 protesters gathered in central Tunis on Monday night to protest the prince's Tuesday arrival for talks with the Tunisian president. (Photo by Hassene Dridi/AP Photo)





Protesters, mostly women, display placards and chant slogans during a rally in central Istanbul, Sunday, November 25, 2018, to mark the United Nations' International Day for the Elimination of Violence Against Women. (Photo by Lefteris Pitarakis/AP Photo)





Romanian wearing traditional clothes take part in the consacration service of the Romanian People's Salvation Cathedral still under construction in Bucharest on November 25, 2018. Tens of thousands of worshippers attended the inauguration of the massive new Orthodox cathedral in Bucharest, amid criticism that public funding for the project could be better used to pay for hospitals and schools in one of the EU's poorest members. (Photo by Daniel Mihailescu/AFP Photo)





A Turkey backed Syrian rebel- fighter warms himself by a fire at a position near the city of al- Bab in Aleppo province on the border with Turkey, on November 26, 2018. (Photo by Nazeer Al-Khatib/AFP Photo)





An Airbus A330neo is pictured on its final assembly line at Airbus headquarters in Colomiers, near Toulouse, France, November 26, 2018. (Photo by Regis Duvignau/Reuters)





NASA engineers Kris Bruvold (L) and Sandy Krasner (R) react after the successful landing by the InSight spacecraft on the planet Mars from the Mission Support area in the Space Flight Operations facility at the NASA Jet Propulsion Laboratory (JPL) in Pasadena, California on November 26, 2018. Cheers and applause erupted at NASA' s Jet Propulsion Laboratory as a $993 million unmanned lander, called InSight, touched down on the Red Planet and managed to send back its first picture. (Photo by Al Seib/Pool via Reuters)





Dancers in Waterloo, London, cheer after breaking the Guinness World Record for the largest disco dance on November 25, 2018. (Photo by Kirsty O’Connor/PA Wire)





Pop.Up Next, a prototype designed by Audi, Airbus and Italdesign is displayed at the Amsterdam Drone Week in Amsterdam, Netherlands, Tuesday, November 27, 2018. The two-seater vehicle combines combines ground transportation with vertical take-off and landing capabilities. (Photo by Peter Dejong/AP Photo)





Sophia social humanoid robot developed by Hong Kong- based company Hanson Robotics at the 2018 Synergy Global Forum at Moscow' s Olimpiysky Arenain Moscow, Russia on November 27, 2018. (Photo by Mikhail Tereshchenko/TASS)





Remotely controlled robots OriHime-D, developed by Ory Lab Inc. to promote employment of disabled people, serve customers at a cafe in Tokyo, Japan on November 26, 2018. (Photo by Issei Kato/Reuters)





A handout photo made available by the World Surf League (WSL) of Stephanie Gilmore of Australia in action during round 3 of the Beachwaver Maui Pro 2018 surfing event as part of the World Surf League in Honolua Bay, Hawaii, USA, 26 November 2018 (issued 27 November 2018). Stephanie Gilmore claimed her historic 7th World Championship title after winning her heat in round 3. (Photo by Ed Sloane/EPA/EFE)





Jonny Mendoza and his dog Subi sled down a snowy hill in a park Monday, November 26, 2018, in Kansas City, Kan. A winter storm brought blizzard-like conditions dumping about 6 inches of snow on the the Kansas City area Sunday before moving east Monday, grounding hundreds of flights and causing some road traffic chaos as commuters returned to work after the Thanksgiving weekend. (Photo by Charlie Riedel/AP Photo)





Cheick Ahmed Al-Hassan Sanou aka Iron Biby prepares to lift 300 kg as he works out at his home of Bobo-Dioulasso, second biggest city of Burkina Faso, on September 24, 2018. “Iron Biby”, 1,90m and 180 kg, one of the top 10 strength athletes in the world, is determined to give of himself to his country, AFP reports. (Photo by Olympia De Maismont/AFP Photo)





The Hannibal Race in Byblos, Lebanon on November 25, 2018. More than 800 foreign and local competitors took part in the 6km obstacle race. (Photo by Xinhua News Agency/Rex Features/Shutterstock)





A man dressed as a devil embraces a child as part of a tradition to determine if she had behaved well during the past year, inside of a sandstone cave in the village of Svitava near the town of Cvikov, Czech Republic on November 26, 2018. (Photo by David W. Cerny/Reuters)





Karol G performs “Mi Cama” at the Latin Grammy Awards on Thursday, November 15, 2018, at the MGM Grand Garden Arena in Las Vegas. (Photo by Chris Pizzello/Invision/AP Photo)





A sandstorm hits the city of Zhangye in Gansu province, China on November 27, 2018. (Photo by Reuters/China Stringer Network)