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A man makes a photo with his smartphone as he attends for the New Year's Eve celebrations at the Puerta del Sol square in Madrid, Spain, on 31 December 2016. This year the police have placed obstacles, such as planters, bollards and heavy vehicles, to prevent attacks. In total, more than 800 personnel are involved in the security system, of which 400 are national police officers and 400 municipal police. (Photo by Santi Donaire/EPA)
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