Tens of thousands of union workers in the Los Angeles Unified School District started walking the picket lines Tuesday over failed contract negotiations, starting a three-day strike that shut down the nation’s second-largest school system. Mary Beth McDade reports for KTLA 5 News at 5, Mar. 21, 2023. Details: https://ktla.com/news/local-news/lausd-strike-begins/ Get Los Angeles breaking news, entertainment, weather, traffic and sports from L.A.'s Very Own, KTLA 5 News. Keeping Southern Californians informed since 1947. Online: https://ktla.com/