solitary confinement is becoming more and more popular throughout the u.s. with some "supermax" prisons have nothing but solitary confinement cells. "some people are held in solitary confinement in special "supermax" prisons, such as california's pelican bay, virginia's red onion, and the federal government's adx in florence, colorado. at least 44 states and the federal system now have supermax prisons, which are generally composed solely of solitary confinement cells. other prisoners live in shus, rhus, and imus within ordinary prisons, and even inside local jails."