Immigrants, part of a caravan of thousands from Central America trying to reach the United States, climb over the border wall into the U.S. as a Mexican police officer arrives on the scene in Tijuana, Mexico, on December 13, 2018. #

Virgin Galactic's carrier airplane WhiteKnightTwo, carrying the space-tourism rocket plane SpaceShipTwo, takes off from Mojave Air and Space Port in California on December 13, 2018. #

This mosaic image, composed of 12 Polycam images collected on December 2, 2018, and provided by NASA, shows the asteroid Bennu. NASA's first look at a tiny asteroid shows that the space rock is more moist and studded with boulders than originally thought. On December 10, scientists released the first morsels of data collected since their spacecraft Osiris-Rex hooked up last week with the asteroid, which is only about three blocks wide and weighs about 80 million tons. Bennu regularly crosses Earth's orbit and will come perilously close to Earth in about 150 years. #

Inmates smile behind prison bars covered in decorative paper, part of a Christmas-decoration contest, at the Nelson Hungria Prison in Rio de Janeiro, Brazil, on December 13, 2018. Inmates serving time for offenses from burglary to homicide spent weeks decking out their cell blocks with handmade Christmas decorations and planning Bible-related performances for the jail's annual Christmas event. #

A demonstrator wearing a gas mask looks at policemen standing guard during a protest against a new labor law outside the Parliament building in Budapest, Hungary, on December 13, 2018. #

Participants hold their lit rondeles, rolled wicker mats soaked in oil, during the Fiesta de los Rondeles, a procession devoted to the virgin of Rondeles, in Casarabonela, near Malaga, Spain, on December 12, 2018, the eve of the Feast of Santa Lucia. #

Dervishes perform during a ceremony marking the 745th anniversary of the death of the Islamic scholar and Sufi mystic Mevlana Rumi at the Konya Metropolitan Municipality Sports and Congress Center in Konya, Turkey, on December 11, 2018. #

A cow looks up after falling into a manhole in Adana, Turkey, on December 13, 2018. The cow was noticed after a dog was constantly barking near the manhole, and was rescued after the hole was widened. #

Police officers caress Dominga, a pregnant mare that was struck by a stray bullet during clashes between criminal gangs, before she undergoes surgery in Aguablanca district, Cali, Colombia, on December 13, 2018. #

In this photo taken on December 12, 2018, the Siskiyou County Sheriff's Department dive team works at the scene where a man survived for hours trapped in his upside-down car after it plunged into a frigid river near Yreka, California. The California Highway Patrol in Yreka says the 28-year-old Michael Finn breathed from a pocket of air inside his vehicle until he was rescued five hours after his car skidded off State Route 96 into the Klamath River in Siskiyou County. #

Ted Pelkey stands in front of a wooden middle-finger sculpture on his front lawn on December 13, 2018, in Westford, Vermont. Pelkey, who is in an ongoing dispute with the town over plans to move his truck-repair-and-recycling business to his property, paid to have the sculpture created to send a message to the town. #

Black Star, by Valter Casotto, presented at the exhibition preview for the Opera Gallery Hyperrealism at New Bond Street on December 13, 2018, in London, England. #

President Donald Trump's former attorney Michael Cohen arrives at U.S. federal court in New York on December 12, 2018, where he was sentenced to three years in prison after pleading guilty to a number of charges. #

Window cleaners, dressed as a dog and wild boar, this year's and next year's Chinese-zodiac animals, pose while cleaning the windows of Hotel Ryumeikan during a promotional event to celebrate the upcoming new year in Tokyo, Japan, on December 13, 2018. #

Mistletoe, a two-year-old Lurcher, is pictured outside the kennels at Battersea Dogs and Cats Home, where it has lived for 69 days, on December 13, 2018, in London, England. The animal shelter, which was founded in London in 1860, is currently seeking homes for some of its longest residents. #

Indian-army soldiers perform a stunt with a horse in Kolkata, India, on December 14, 2018, during celebrations ahead of Vijay Diwas, a ceremony to celebrate the liberation of Bangladesh by the Indian Armed Forces on December 16, 1971. #

An Armed Forces of the Democratic Republic of the Congo soldier rests next to a road after an Islamist rebel group called the Allied Democratic Forces attacked the area around Mukoko village in the North Kivu province of the Democratic Republic of Congo on December 11, 2018. #