A man wears a lapel pin reading “Impeach” as activists rally in support of the impeachment of U.S. President Donald Trump on Capitol Hill in Washington, U.S., December 18, 2019. (Photo by Tom Brenner/Reuters)





China's President Xi Jinping (R) shakes hands with a girl as she and other children welcome Xi upon his arrival at Macau's international airport in Macau on December 18, 2019, ahead of celebrations for the 20th anniversary of the handover from Portugal to China. Chinese president Xi Jinping landed in Macau on December 18 as the city prepares to mark 20 years since the former Portuguese colony was returned, a celebration that stands in stark contrast to months of unrest in neighbouring Hong Kong. (Photo by Anthony Wallace/AFP Photo)





An explosion is seen following a reported Syrian government air strike on a residential district of Maaret al-Numan in the northwestern Idlib province on December 18, 2019. (Photo by Omar Haj Kadour/AFP Photo)





A rock flies past members of security forces standing behind riot shields during a protest against Chile's government in Santiago, Chile on December 18, 2019. (Photo by Ricardo Moraes/Reuters)





A woman takes cover behind a tree during clashes between riot police officers and demonstrators at a protest against Chile's government in Santiago, Chile on December 18, 2019. (Photo by Andres Martinez Casares/Reuters)





A demonstrator throws a rock at a police vehicle during a protest against Chile's government in Santiago, Chile on December 18, 2019. (Photo by Andres Martinez Casares/Reuters)





A woman walks her bike as members of the security forces patrol in Santiago, Chile on December 18, 2019. (Photo by Ricardo Moraes/Reuters)





Demonstrators run near a riot police vehicle which has been set on fire during a protest against Chile's government in Santiago, Chile on December 18, 2019. (Photo by Ricardo Moraes/Reuters)





A member of the security forces falls down during a protest against Chile's government in Santiago, Chile, December 18, 2019. (Photo by Ivan Alvarado/Reuters)





Women wearing goggles and masks react as demonstrators clash with riot police during a protest against Chile's government in Santiago, Chile on December 18, 2019. (Photo by Andres Martinez Casares/Reuters)





Security forces' members gesture towards a woman in Santiago, Chile on December 18, 2019. (Photo by Andres Martinez Casares/Reuters)





Catalan pro-independence demonstrators block a road as they protest outside the Camp Nou stadium ahead of a Spanish La Liga soccer match between Barcelona and Real Madrid in Barcelona, Spain, Wednesday, December 18, 2019. Thousands of Catalan separatists are planning to protest around and inside Barcelona's Camp Nou Stadium during Wednesday's match against fierce rival Real Madrid. (Photo by Felipe Dana/AP Photo)





A fan poses as he awaits a gala screening of “Star Wars: The Rise of Skywalker” film in Cologne, Germany, December 17, 2019. (Photo by Thilo Schmuelgen/Reuters)





Members of the Gzhel Moscow Dance Theatre company during a performance as part of the Russian Culture Week in Hainan Province, China on December 19, 2019. (Photo by Artyom Ivanov/TASS)





Lights and smoke are checked amongst the rhododendrons at the Lost Gardens of Heligan in St Austell, Cornwall, where an art installation by international light artist Ulf Pederson, titled The Art of Illumination opens to the public on December 19, 2019. (Photo by Ben Birchall/PA Images via Getty Images)