Jefferson High School student Raul Preciado, 18, one of the thousands of Los Angeles area students to participate in pro-immigration rallies in the past week, is pictured inside a Jefferson High School hallway in Los Angeles, March 29, 2006. U.S. immigration reform may spark political activism among Latino youth in California who see plans to tighten borders as an attack on their identity. Tens of thousands of California Latino high schoolers have cut classes, marched through cities and blocked