Classically trained Lebanese trumpeter Ibrahim Maalouf has played with everyone from Sting to Salif Keita. While most trumpets have three valves, his has four, allowing him to play the quarter-tones that characterize Middle Eastern music and the "blue notes" of jazz.

Poetry and other art forms have been integral to the "Peace with Justice and Dignity" movement. Poet Javier Sicilia, whose son was murdered by members of a drug cartel, says the poet has a moral responsibility to tell these stories.