‘The US should be held accountable’: Guantánamo survivor on the war on terror’s failure

After 20 years during which he was routinely tortured, Mansoor Adayfi, who now lives in Serbia, asks: ‘What if that had been American boys?’When a shackled Mansoor Adayfi was lumped on to a heap of shivering, naked bodies in the pitch black, a hood ove…