“When I first arrived, my military escort said, ‘Gitmo: the best posting a soldier can have. There’s so much fun here!’,” recalls US photographer Debi Cornwall. “So I said, ‘Show me the fun!’” She had just touched down at Guantánamo Bay naval base, home to the infamous detention centre established in 2002 by US president George W Bush for the interrogation of suspected terrorists, enemy combatants and “extremely dangerous individuals” – “the worst of the worst, they call them” – following the 9/11 attacks. Since then, it has forged a reputation as hell on earth, where men are held for years without charge or legal process, and are often tortured. With 12 years’ experience of working as a wrongful-conviction lawyer, Cornwall began to enquire.