Edward Caraballo was incarcerated in the detention facility that is the largest in Pakistan east of what city?
Edward Caraballo:  He was sentenced to an eight-year prison term (later reduced on appeal to two years) and incarcerated in Afghanistan's Pul-e-Charkhi prison. Pul-e-Charkhi prison: Pul-e-Charkhi (Persian: زندان پل چرخی), also known as Pul-i-Charkhi or Afghan National Detention Facility, is the largest prison in Afghanistan east of Kabul.
Kabul