Αρχική A demonstrator holds pencils in tribute to the victims of a shooting by gunmen at the offices of French satirical weekly Charlie Hebdo during a demonstration in Niteroi A demonstrator holds pencils in tribute to the victims of a shooting by gunmen at the offices of French satirical weekly Charlie Hebdo during a demonstration in Niteroi

A demonstrator holds pencils in tribute to the victims of a shooting by gunmen at the offices of French satirical weekly Charlie Hebdo during a demonstration in Niteroi

A demonstrator holds pencils in tribute to the victims of a shooting by gunmen at the offices of French satirical weekly Charlie Hebdo, during a demonstration organized by the NGO Rio de Paz (Rio of Peace) in Niteroi, near Rio de Janeiro, Brazil, January 8, 2015. REUTERS/Ricardo Moraes

People take part in a vigil to pay tribute to the victims of a shooting, by gunmen at the offices of weekly satirical magazine Charlie Hebdo in Paris, in the Manhattan borough of New York
A person holds a pen, symbolising freedom of speech, as lights on the Eiffel Tower start to dim before switching off for five minutes in Paris