Cartoonists are propagandists and satirists, artists and writers. They make us laugh -- in recognition and shame -- and enrage and offend. At an "Open Art" event co-presented by the Getty in conjunction with the Getty Research Institute exhibition "World War I: War of Images, Images of War," the many roles cartoonists play and have played over the past century were discussed and dissected by cartoonist Lalo Alcaraz, USC's Marty Kaplan, Getty curator Nancy Perloff, and Chris Lamb, author of Drawn to Extremes: The Use and Abuse of Editorial Cartoons.