Police officers detain gay rights activists during a May Day rally in St. Petersburg, Russia, 01 May 2017. Labor Day or May Day is observed all over the world on the first day of the May to celebrate the economic and social achievements of workers and fight for laborers rights. (Photo by Anatoly Maltsev/EPA)





People enjoy during a May Day rally in St. Petersburg, Russia, 01 May 2017. (Photo by Anatoly Maltsev/EPA)





Clashes erupt between protesters and French anti-riot police during a May Day demonstration against French far-right in Paris, France, 01 May 2017. Thousands of people demonstrated against the presence of Far-right Front National (FN) party candidate Marine Le-Pen for the second turn of the presidential elections. Labor Day or May Day is observed all over the world on the first day of the May to celebrate the economic and social achievements of workers and fight for laborers rights. (Photo by Christophe Petit Tesson/EPA)





A protestor is struck while curled up on the ground during a clash between French anti-riot police and protestors at a May Day demonstration against French far-right in Paris, France, 01 May 2017. (Photo by Yoan Valat/EPA)





Demonstrators confront police on the annual May Day worker's march on May 1, 2017 in Paris, France. Police dealt with violent scenes in central Paris during the rally held close to the Place de la Bastille, where protestors shouted “Fascists out!”. (Photo by Jeff J. Mitchell/Getty Images)





Turkish riot police arrest a protester seeking to defy a ban and march to Istanbul's Taksim square to celebrate May Day in Istanbul on May 1, 2017. Police tried to stop around 200 protesters in the Gayrettepe district on the European side of Istanbul who wanted to walk to the famous square in spite of the ban by city authorities. The protesters – made up of left-wing groups – unfurled anti-government banners against the result of the April 16 referendum, which handed President Recep Tayyip Erdogan expanded powers. (Photo by Gurcan Ozturk/AFP Photo)





A riot police officer aims during the May Day march, Monday May 1, 2017, in Paris. With just six days until a French presidential runoff that could define Europe's future, far-right leader Marine Le Pen and centrist Emmanuel Macron held high-stakes rallies Monday that overlapped with May Day marches and underscored the fact that jobs are voters' No. 1 concern. (Photo by Kamil Zihnioglu/AP Photo)





Protesters clash with riot police as they attempt to force their way closer to a Labor Day march, in Turin, Italy, Monday, May 1, 2017. (Photo by Alessandro Di Marco/ANSA via AP Photo)





Protesters clash with riot police as they attempt to force their way closer to the U.S. Embassy to mark the global celebration of May Day in Manila, Philippines Monday, May 1, 2017. As in the past years, workers mark May Day with calls for higher wages and an end to the so-called “Endo” or contractualization. (Photo by Bullit Marquez/AP Photo)





Demonstrators clash with riot policemen during a rally marking May Day in Santiago, Chile on May 1, 2017. (Photo by Ivan Alvarado/Reuters)





French CRS riot police protect themselves from flames during clashes at the traditional May Day labour union march in Paris on May 1, 2017. (Photo by Gonzalo Fuentes/Reuters)





Security personnel take away a man during a May Day rally in Havana, Cuba on May 1, 2017. (Photo by Alexandre Meneghini/Reuters)





Demonstrators attend a May Day march in London on May 1, 2017. (Photo by Stefan Wermuth/Reuters)





A member of the Tunisian General Labour Union (UGTT) is thrown into the air by his colleagues during a rally to mark International Workers' Day, or Labour Day, in Tunis, Tunisia on May 1, 2017. (Photo by Zoubeir Souissi/Reuters)





A member of riot police walks in front of a flaming barricade during a May Day rally in Gijon, Spain on May 1, 2017. (Photo by Eloy Alonso/Reuters)





Demonstrators clash with people opposing their rally during a May Day protest in Union Square in New York City on May 1, 2017. (Photo by Mike Segar/Reuters)





Plainclothes police officers detain a protester as she and others attempt to defy a ban and to gather at Taksim Square to celebrate May Day, in central Istanbul, Turkey on May 1, 2017. (Photo by Kemal Aslan/Reuters)





Activists wear masks depicting the face of Jean-Marie Le Pen, the founder of the French far-right National Front, with the hair of his daughter Marine Le Pen, French National Front (FN) candidate for 2017 presidential election, during a demonstration as part of traditional May Day labour day march in Paris, France on May 1, 2017. (Photo by Gonzalo Fuentes/Reuters)





A protester dressed as a clown holds an umbrella over a Swiss police officer on a motorbike during a May Day demonstration in Zurich, Switzerland on May 1, 2017. (Photo by Arnd Wiegmann/Reuters)





Flames from a burning cardboard dragon in a caddy are seen near French CRS riot police during clashes as part of the traditional May Day labour union march in Paris on May 1, 2017. (Photo by Gonzalo Fuentes/Reuters)





Revellers attend May Day celebrations outside Magdalen College as the sun rises over Oxford, Britain on May 1, 2017. (Photo by Dylan Martinez/Reuters)





Workers from the Korean Confederation of Trade Unions (KCTU) holding red-colored umbrellas march during a May Day rally in Seoul, South Korea. (Photo by Kim Hong-Ji/Reuters)





French gendarmes apprehend a demonstrator during clashes at the traditional May Day labour union march in Paris, France on May 1, 2017. (Photo by Gonzalo Fuentes/Reuters)





Workers of the agriculture sector march past during the celebration marking the international workers' day at Agege stadium in Nigeria's commercial capital Lagos on May 1, 2017. (Photo by Akintunde Akinleye/Reuters)





Indonesian workers wear masks as they march during a May Day rally in Jakarta, Indonesia on May 1, 2017. (Photo by Reuters/Beawiharta)





A man shouts slogans while protesters hold banners as they attempt to defy a ban and march on Taksim Square to celebrate May Day in Istanbul, Turkey. (Photo by Umit Bektas/Reuters)





A police officer detains a protester as she and others attempt to defy a ban and to gather at Taksim Square to celebrate May Day, in central Istanbul, Turkey on May 1, 2017. (Photo by Kemal Aslan/Reuters)





Police arrest demonstrators as they march during May Day, in Istanbul, Monday, May 1, 2017. Security forces prevented leftist groups trying to reach city's iconic Taksim Square to celebrate May Day. (Photo by Lefteris Pitarakis/AP Photo)





People hold flags as they take part in a May Day rally in rebel-held Luhansk, Ukraine on May 1, 2017. (Photo by Alexander Ermochenko/Reuters)





A child rides a scooter before a May Day rally held by Russian Communist party in central Krasnoyarsk, Siberia. The banner reads, “Long live May 1!” on May 1, 2017. (Photo by Ilya Naymushin/Reuters)





Turkish riot police scuffle with a group of protesters as they attempted to defy a ban and march on Taksim Square to celebrate May Day in Istanbul, Turkey on May 1, 2017. (Photo by Murad Sezer/Reuters)





A man waves a flag with an image of Che Guevara at a march during the May Day or Labour Day rally organised by People's Liberation Front opposition party in Colombo, Sri Lanka. (Photo by Dinuka Liyanawatte/Reuters)





Workers and contractors from PT Freeport travel in a convoy during a rally commemorating May Day in Timika, Papua province, Indonesia on May 1, 2017. (Photo by Wahyu Putro A/Reuters/Antara Foto)





Union members take part in a May Day Rally organised by the newly-formed South African Federation of Trade Unions (SAFTU) in Durban, South Africa on May 1, 2017. (Photo by Rogan Ward/Reuters)





People attend a rally commemorating May Day in central Kiev, Ukraine on May 1, 2017. (Photo by Gleb Garanich/Reuters)





Cuba's President Raul Castro looks through a binocular as he watches a May Day rally in Havana, Cuba on May 1, 2017. (Photo by Alexandre Meneghini/Reuters)





Turkish police ride motorcycles during the May Day in Istanbul, Turkey on May 1, 2017. (Photo by Murad Sezer/Reuters)





Protesters holding a poster with portraits of Russian President Vladimir Putin, right, Russian Prime Minister Dmitry Medvedev, centre, and Chechnya's regional leader Ramzan Kadyrov walk past an eternal flame during a rally marking May Day in downtown St.Petersburg, Russia, Monday, May 1, 2017. (Photo by Dmitri Lovetsky/AP Photo)