Camp Cropper prison, Iraq

Detainees walk around and others pray at the Camp Cropper detention centre Photograph: John Moore/Getty

Detainees pray outside Photograph: John Moore/Getty

Juvenile detainees pray at the 'House of Wisdom' school operated by the US military near Camp Cropper. More than 800 juveniles are now in American custody at the site. Most were captured during this year's American troop 'surge'. They attend classes in Arabic, science, maths, history, civics and English every three days Photograph: John Moore/Getty

US army guards watch as juvenile detainees wash before prayers at the 'House of Wisdom' school Photograph: John Moore/Getty

A juvenile detainee puts on a medical foot support after finishing prayers at the 'House of Wisdom' school Photograph: John Moore/Getty

Juvenile detainees wait for their turn outside portable bathrooms at the school Photograph: John Moore/Getty

A juvenile detainee stands in an outdoor solitary confinement cell Photograph: John Moore/Getty

Injured detainees wait at a clinic to have their bandages changed Photograph: John Moore/Getty

A wounded detainee sits in a wheelchair Photograph: John Moore/Getty

A detainee on death row lies in his solitary confinement cell. He was first detained by US forces and later sentenced to death for murder by an Iraqi criminal court Photograph: John Moore/Getty

A US army guard handcuffs a detainee on death row before taking him out for two hours of exercise Photograph: John Moore/Getty

Detainees are moved by US army guards Photograph: John Moore/Getty

A detainee is escorted by US army guards Photograph: John Moore/Getty

A US army soldier watches detainees Photograph: John Moore/Getty