Larry Siems in The Guardian:
There were 20 cells inside the prison, each a stand-alone concrete box. In 16, prisoners were shackled to a metal ring in the wall. In four, designed for sleep deprivation, they stood chained by the wrists to an overhead bar. Those in the regular cells had a plastic bucket; those in sleep deprivation wore diapers. When diapers weren’t available, guards crafted substitutes with duct tape, or prisoners were chained naked in their cells. The cellblock was unheated, pitch black day and night, with music blaring around the clock.
“The atmosphere was very good,” John “Bruce” Jessen told a CIA investigator in January 2003, two months after he interrogated a prisoner named Gul Rahman in the facility. “Nasty, but safe.”
Jessen, one of the two contract psychologists who designed the CIA’s “enhanced interrogation techniques”, spent 10 days in the secret prison near Kabul, Afghanistan, in November 2002. Five days after he left, Rahman, naked from the waist down and shackled to the cold concrete floor, was discovered dead in his cell from hypothermia.