Overcoming an array of political and bureaucratic hurdles, actor-director Rob Reiner will announce today the launch of a tobacco tax-funded preschool program for tens of thousands of 4-year-olds throughout Los Angeles County and the rest of California. "This is a great day for the children of Los Angeles," said Reiner, chairman of First 5 California. "By launching this effort to provide access to higher-quality preschools for thousands of children, (Los Angeles Universal Preschool) is helping to solve the preschool crisis that exists in this county and state." Reiner and Los Angeles County Supervisor Gloria Molina are expected to join preschoolers...