Watch Lockup: San Quentin: Extended Stay for $0 Today

Cameras go behind the crumbling walls of San Quentin State Prison in California, where overcrowding and lack of modernization are blamed for an ever-increasing number of inmate attacks on guards. The facility, which has four cell blocks containing more than 800 prisoners each, also houses a number of death row inmates. As one guard bluntly explains, the attitude of many of the prisoners on death row is "You can only kill me once," so officers are on constant guard against attack.