Chris Arendt is not your conventional Guantánamo guard. Pale and gangly with a Mohican haircut and a shabby hoodie, he’s a proud vegetarian and a self-declared anarchist. Yet this rebellious anti-establishment 19-year-old was let inside the gates of one of the world’s most notorious prisons and asked to hand out sheets of toilet paper to people who supposedly pose some of the greatest threats to Western civilization.

‘The rule was eight sheets per visit. They said we couldn’t give them any more because “they might make knives out of it”. You try using just eight squares of paper – I’m telling you it isn’t easy.’