ANZA - The Cahuilla Band of Indians has petitioned a U.S. federal judge to join a 55-year-old lawsuit over water rights to the Santa Margarita River system that runs from Anza to Oceanside. In filing suit in U.S. District Court in San Diego, tribal leaders want to strengthen the reservation's previously established legal right to water in the Anza Basin by having the court specify how much the tribe can take. The tribe also hopes its action will prompt Riverside County officials to put new development and well-drilling on hold in the area to prevent possible overdrafting of underground supplies....