I surrendered," Mike Tyson says simply as the ghosts of his past swarm around us on a hazy winter afternoon in Henderson. We're only a half-hour drive from the jittery Las Vegas Strip but here, on a couch in his office, Tyson sits quietly. He rests his familiar tattooed face in the palm of his hand. After Muhammad Ali he remains the world's most recognisable boxer, and one of sport's most infamous characters. Yet Tyson looks most like a 47-year-old man trying hard to understand his tumultuous life.