Its official name is the U.S. Penitentiary Administrative Maximum Facility, but everyone calls it "ADX" or "ADX Florence." The ADX in Florence, Colorado, is the one and only federal "Supermax" prison, ...

Its official name is the U.S. Penitentiary Administrative Maximum Facility, but everyone calls it "ADX" or "ADX Florence." The ADX in Florence, Colorado, is the one and only federal "Supermax ...

Reporter says prison ... media tour of the U.S. Bureau of Prison's Administrative Maximum prison -- also known as "Supermax." What follows is Frieden's account of his experience. FLORENCE ...

NBC Chicago reached out to the Bureau of Prisons, which oversees ADX Florence, for comment. We have not heard back at the time of publishing. Hoover, 74, had been a federal inmate since 1998.