Brazil graffiti artists seen more as Van Goghs than vandals

SAO PAULO — Graffiti?s long struggle to be seen as valid urban expression, not vandalism, is being crowned this month with an exhibition in Brazil by international artists who not only sprayed official works but also spruced up abandoned corners of Sao Paulo. A raid on a dilapidated factory by many of the 66 artists on the eve of the event?s opening was a celebration of the roots of