ISTANBUL, TURKEY - MAY 1: Turkish riot police use water cannons and tear gas to disperse protesters during a May Day demonstration on May 1, 2014 in Istanbul, Turkey. Turkish police fired water cannon and tear gas on Thursday in an attempt to prevent hundreds of protesters from defying a ban on May Day rallies and reaching Istanbul's central Taksim Square, the focal point of protests last summer. (Photo by Burak Kara/Getty Images)
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