Supermax prison
Most secure levels of custody in the prison systems of certain countries / From Wikipedia, the free encyclopedia
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"Supermax" redirects here. For other uses, see Supermax (disambiguation).
A super-maximum security (supermax) or administrative maximum (ADX) prison is a "control-unit" prison, or a unit within prisons, which represents the most secure level of custody in the prison systems of certain countries.
The objective is to provide long-term, segregated housing for inmates classified as the highest security risks in the prison system and those who pose an extremely serious threat to both national and global security.[1]