The first of his short films — about the shadowy world of private military contractors — will be released in June as part of a viral marketing campaign for the latest instalment of the Call of Duty video game franchise. Mr Mann said: “I don’t find these places to be terrifying. They’re not if approached in the right way. Sierra Leone is very stable, Algeria is booming, Mali’s still a bit wobbly. I can get to speak to people who are out of reach to other journalists.