How ADX Florence actually works, according to a former supermax inmate

How ADX Florence actually works, according to a former supermax inmate

Eric King served almost two years at the federal super-maximum security prison ADX Florence in Colorado. ADX is often described as the US's most restrictive prison, and it houses some of the most notorious prisoners in the world, including Joaquín Guzmán ("El Chapo") and Terry Nichols, the Oklahoma City bomber.King talks to Business Insider about the security measures, like concrete cells, the psychological toll, and the nearly constant isolatio…