French gendarmes patrol in the streets of the city of Strasbourg, eastern France, following a shooting, Wednesday, Dec. 12, 2018. A man who had been flagged as a possible extremist sprayed gunfire near the city of Strasbourg's famous Christmas market Tuesday, killing three people, wounding 12 and sparking a massive manhunt. France immediately raised its terror alert level. (AP Photo/Christophe Ena)

French police officers patrol next to Notre-Dame cathedral of Strasbourg following a shooting in the city of Strasbourg, eastern France, Wednesday, Dec. 12, 2018. A man who had been flagged as a possible extremist sprayed gunfire near the city of Strasbourg's famous Christmas market Tuesday, killing three people, wounding 12 and sparking a massive manhunt. France immediately raised its terror alert level. (AP Photo/Jean Francois Badias)

Soldiers patrol in Strasbourg, eastern France, after a shooting Tuesday Dec.11, 2018. French prosecutors say a terror investigation has been opened into the shooting at a Christmas market in Strasbourg that has left two dead and up to eight wounded, including several in critical condition. (AP Photo)

FILE - In this Oct. 1, 2017 file photo, Spanish national police block people trying to reach a voting site at a school assigned to be a polling station by the Catalan government for a secession referendum in Barcelona, Spain. Spain’s central government threatened on Tuesday, Dec. 11, 2018, to send in national police to ensure security in Catalonia if regional authorities fail to stop recent disruptions by pro-independence protesters on major highways. (AP Photo/Emilio Morenatti, File)

In this photo taken Friday, Dec. 7, 2018, women and girls walk back after getting food in Bentiu, a 38 kilometers (24 miles) journey using a path through the bush for fear of being attacked on the main road, near Nhialdu in South Sudan. Rape has been used widely as a weapon in South Sudan and even after a peace deal was signed in September, humanitarians have warned of higher rates of sexual assault as growing numbers of desperate people try to reach aid. (AP Photo/Sam Mednick)

Demonstrators walk through tear gas during clashes Saturday, Dec. 8, 2018 in Paris. Crowds of yellow-vested protesters angry at President Emmanuel Macron and France's high taxes tried to converge on the presidential palace Saturday, some scuffling with police firing tear gas, amid exceptional security measures aimed at preventing a repeat of last week's rioting. (AP Photo/Rafael Yaghobzadeh)

Firefighters try to extinguished a car set on fire by demonstrators during clashes with riot police, in Paris, France, Saturday, Dec. 8, 2018. Crowds of protesters angry at President Emmanuel Macron and France's high taxes tried to converge on the presidential palace Saturday, some scuffling with police firing tear gas, amid exceptional security measures aimed at preventing a repeat of last week's rioting. (AP Photo/Thibault Camus)

A climate activists with a colorful mask attends the March for Climate in a protest against global warming in Katowice, Poland, Saturday, Dec. 8, 2018, as the COP24 UN Climate Change Conference takes place in the city. (AP Photo/Alik Keplicz)

FILE - In this Aug. 15, 2018 file photo, Jesse Shapins, director of public realm with Google affiliate Sidewalk Labs, takes questions at a public forum about a proposed development on Toronto's waterfront in Toronto, Canada. Ontario’s provincial government on Friday, Dec. 7, 2018, has fired three board members from a government organization working with the Google-affiliated company to create the smart-city development in Toronto. The move raises doubt about the development’s future. (AP Photo/Rob Gillies)