When Bruce Jessen was asked about his first interrogation of Gul Rahman – a detainee in the war on terror who died after being slapped, punched, chained to walls, hooded, dragged up and down a corridor, kept naked in the cold, and deprived of sleep, food and water – Jessen couldn’t remember what the man had been wearing. Might have been pajamas or sweatpants, he told the CIA interrogator.