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People take part to a protest march organized by PAME (All Workers Militant Front) at Omonia square, central Athens, on Wednesday May 17, 2017. Thousands participated to protest marches, during 24-hour nationwide general strike called by the countrys two biggest public and private labor unions, General Confederation of Employees of Greece (GSEE) and the Civil Servants' Confederation (ADEDY). Workers are protesting against the governments new deal with Greece's international creditors that imposes new tax hikes and spending cuts. (Photo by Panayotis Tzamaros/NurPhoto via Getty Images)

People take part to a protest march organized by PAME (All Workers Militant Front) at Omonia square, central Athens, on Wednesday May 17, 2017. Thousands participated to protest marches, during 24-hour nationwide general strike called by the countrys two biggest public and private labor unions, General Confederation of Employees of Greece (GSEE)  and the Civil Servants' Confederation (ADEDY). Workers are protesting  against  the governments new deal with Greece's international creditors that imposes new tax hikes and spending cuts. (Photo by Panayotis Tzamaros/NurPhoto via Getty Images)

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Police officers shout slogans hold flares during a demonstration in central Athens on May 17, 2017. Police officers from around Greece, along with firefighters and coast guard officers, protest for the new government agreement with the international creditors of Greece imposing new tax increases and cuts in spending. (Photo by Panayotis Tzamaros/NurPhoto via Getty Images)

Police officers shout slogans hold flares during a demonstration in central Athens on May 17, 2017. Police officers from around Greece, along with firefighters and coast guard officers, protest for the new government agreement with the international creditors of Greece imposing new tax increases and cuts in spending. (Photo by Panayotis Tzamaros/NurPhoto via Getty Images)

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Anti-austerity demonstration during the voting on new austerity measures in Athens, Greece, May 18, 2017. Police fired tear gas and some people with hoods throw molotov bombs. (Photo by Giorgos Georgiou/NurPhoto via Getty Images)

Anti-austerity demonstration during the voting on new austerity measures in Athens, Greece, May 18, 2017. Police fired tear gas and some people with hoods throw molotov bombs. (Photo by Giorgos Georgiou/NurPhoto via Getty Images)