Protester yells slogans as members of student groups and labor unions stage a protest demonstration during the Americas Summit in Cartagena

 
Protester yells slogans as members of student groups and labor unions stage a protest demonstration during the Americas Summit in Cartagena
A protester yells slogans as members of student groups and labor unions stage a protest demonstration during the Americas Summit in Cartagena April 14, 2012. Heads of state are meeting here from April 14-15. REUTERS/Ricardo Moraes (COLOMBIA - Tags: POLITICS BUSINESS)