A protestor struggles to cross a police barricade during a demonstration against the proposed Kinder Morgan pipeline on Parliament Hill in Ottawa, Ontario, Canada, October 24, 2016. (Photo by Chris Wattie/Reuters)





Protestors are detained after crossing a police barricade during a demonstration against the proposed Kinder Morgan pipeline on Parliament Hill in Ottawa, Ontario, Canada, October 24, 2016. (Photo by Chris Wattie/Reuters)





Protestors are pushed by Royal Canadian Mounted Police (RCMP) officers while trying to cross a police barricade during a demonstration against the proposed Kinder Morgan pipeline on Parliament Hill in Ottawa, Ontario, Canada, October 24, 2016. (Photo by Chris Wattie/Reuters)





A protestor struggles to cross a police barricade during a demonstration against the proposed Kinder Morgan pipeline on Parliament Hill in Ottawa, Ontario, Canada, October 24, 2016. (Photo by Chris Wattie/Reuters)





Protestors are detained after crossing a police barricade during a demonstration against the proposed Kinder Morgan pipeline on Parliament Hill in Ottawa, Ontario, Canada, October 24, 2016. (Photo by Chris Wattie/Reuters)





A passing bystander is reflected in a shop window as a South African police van is set on fire on October 25, 2016 in Johannesburg, during a university students' protest against tuition fees, racism and inequality. Weeks of demonstrations at South African universities have targeted high student tuition fees – but protestors say they are also about inequality in a society still plagued by the legacy of apartheid. (Photo by Gianluigi Guercia/AFP Photo)





A riot policeman watches as a police vehicle burns in Braamfontein, Johannesburg, South Africa, Tuesday, October 25, 2016. Rioters in South Africa set a police vehicle on fire Tuesday and stoned vehicles near a Johannesburg university that has been the scene of sometimes violent protests by students demanding free education. The violence broke out in streets near the University of the Witwatersrand at around the same time that student protesters met and marched off the campus, South African media reported. (Photo by Yeshiel Panchia/AP Photo)





A fireman attempts to extinguish a burning bus in Braamfontein, Johannesburg, South Africa, Tuesday, October 25, 2016. (Photo by Yeshiel Panchia/AP Photo)





A fireman stands at a burning bus in Braamfontein, Johannesburg, South Africa, Tuesday, October 25, 2016. (Photo by Yeshiel Panchia/AP Photo)





Demonstrators wear Paddington Bear masks during a protest highlighting the plight of child refugees, outside the Home Office in London, Britain October 24, 2016. (Photo by Peter Nicholls/Reuters)





A demonstrator holds Paddington Bear soft toys during a protest highlighting the plight of child refugees, outside the Home Office in London, Britain October 24, 2016. (Photo by Peter Nicholls/Reuters)





Demonstrators clash with riot police during a student rally demanding a referendum to remove Venezuela's President Nicolas Maduro in Caracas, Venezuela October 24, 2016. (Photo by Marco Bello/Reuters)





Demonstrators shout slogans in front of riot police during a student rally demanding a referendum to remove Venezuela's President Nicolas Maduro in Caracas, Venezuela October 24, 2016. (Photo by Marco Bello/Reuters)





Demonstrators clash with riot police during a student rally demanding a referendum to remove Venezuela's President Nicolas Maduro in Caracas, Venezuela October 24, 2016. (Photo by Marco Bello/Reuters)





A riot police officer fires into the air during clashes with opposition supporters in a rally to demand a referendum to remove President Nicolas Maduro in San Cristobal, Venezuela October 24, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)





A riot police officer throws a stone during clashes with opposition supporters in a rally to demand a referendum to remove President Nicolas Maduro in San Cristobal, Venezuela October 24, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)





Demonstrators clash with riot police during a rally to demand a referendum to remove Venezuela's President Nicolas Maduro in San Cristobal, Venezuela October 24, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)





An injured youth is helped by his fellow demonstrators after clashes with riot police during a rally to demand a referendum to remove Venezuela's President Nicolas Maduro in San Cristobal, Venezuela October 24, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)





Demonstrators clash with riot police during a rally to demand a referendum to remove Venezuela's President Nicolas Maduro in San Cristobal, Venezuela October 24, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)





Government supporters listen to a speech by Venezuela's president Nicolas Maduro during a political rally against Congress in Caracas, Venezuela, Tuesday, October 25, 2016. After the government suspended a recall referendum seeking President Nicolas Maduro's removal last week, the opposition-controlled congress began debating his “constitutional situation”. Lawmakers vow to present evidence that Maduro is a dual Colombian citizen and therefore constitutionally ineligible to hold Venezuela's highest office. (Photo by Alejandro Cegarra/AP Photo)