A protester wearing a Guy Fawkes mask holds a sign protesting proposed constitutional amendment PEC 37 at the Copacabana beach in Rio de Janeiro

 
A protester wearing a Guy Fawkes mask holds a sign protesting proposed constitutional amendment PEC 37 at the Copacabana beach in Rio de Janeiro
A protester wearing a Guy Fawkes mask holds a sign protesting proposed constitutional amendment PEC 37, which puts the power of criminal investigation exclusively in the hands of the police, at the Copacabana beach in Rio de Janeiro June 23, 2013. REUTERS/Lucas Landau