The three Viz magazine cartoonists from left to right, Davey Jones, Simon Thorp and Graham Dury pose for the photographer in central London, Wednesday Nov. 4, 2009. The comic magazine has influenced a generation of British humorists and celebrates its 30th birthday with a major exhibition opening Wednesday at London's Cartoon Museum. Describing Viz is tricky _ especially in a family publication. It has echoes of classic U.S. humor magazines Mad and National Lampoon, with a dash of The Onion's news parodies. Like 'South Park,' it exploits the comic potential of potty-mouthed children, and like 'The Simpsons' it skewers the mob mentality. (AP Photo/Lefteris Pitarakis)