With more thieves, drug dealers and addicts entering each month, how do under-resourced staff cope when a prison reaches breaking point?
In Utah State Prison one in four of the prisoner population has gang ties. Gangs battling gangs and extreme loyalty - but this time it's behind bars
Phoenix, Arizona prides itself on keeping jail costs low, making inmates labour for their upkeep in the nation's only chain gang.
Follow three new recruits as they face the challenges of officer training at the tough and isolated prison in Rawlins, Wyoming.
Ironwood Correctional Facility is set in the middle of the desert. When a riot breaks out, the 81 prisoners have some tough decisions to make.
Iowa separates its youthful offenders from their hardened adult prisons. But is housing 1,100 young convicts together a breeding ground for trouble?