A Turkish protester wearing a gas mask stands amid a fog of tear gas that was fired by riot police to disperse a May Day rally in Taksim Square in Istanbul on May 1, 2014. Turkish police used water canon and tear gas to disperse thousands of protesters who tried to defy a Labour Day ban on demonstrations on Istanbul's Taksim Square, the scene of protests that have dogged the government for months. AFP PHOTO/BULENT KILIC        (Photo credit should read BULENT KILIC/AFP/Getty Images)