SAO PAULO, BRAZIL - JUNE 12: Demonstrators from the anarchist group Black Bloc clash with police during a protest against the holding of the World Cup on the opening day of the event on June 12, 2014 in Sao Paulo, Brazil .  Military police resonded to the protest and there were reported injuries. This is the first day of the 2014 FIFA World Cup. (Photo by Victor Moriyama/Getty Images)