Christopher Allen was trying to make it as a war reporter when, aged just 26, he was shot and killed on the frontline in South Sudan. But as news of his death began to spread, suspicion grew. Some claimed he was really there as a mercenary, a fighter. Others said he was a reckless freelancer, in over his head. And there was another question: was he killed on purpose, or was this another accident of war? From Tortoise and the team behind Sweet Bobby, Pig Iron is a dark adventure in war and journalism – and into what really happened to Christopher Al...