California is installing nearly 1,000 sophisticated metal detectors, scanners and secret security cameras at its prisons in its latest attempt to thwart the smuggling of cellphones, thousands of which continue to flood the prisons despite previous efforts. Officials say the phones can be used to coordinate everything from attacks in prison to crimes on the street, yet they have thus far been unable to prevent even high-security inmates like cult killer Charles Manson from repeatedly getting the devices that are illegal behind bars.