The Brazil riot police clashed with protesters in Sao Paulo, Rio de Janeiro and several other host cities yesterday as the World Cup got underway in Brazil. Officers used tear gas and rubber truncheons to disperse protesters near a metro station on the route to the Arena Corinthians. Several people were also injured after scuffles broke out in Rio de Janeiro. Protesters are angry at how much the government has spent on preparations for the World Cup and the Olympics, which Rio will host in 2016.Earlier, striking airport workers in Rio de Janeiro blocked a road outside the airport, demanding a wage increase and a World Cup bonus.