Radio column: Overcoming prejudices

Until now, I've always had the World Service and Radio 4 down as the places to look for hard-hitting, politically challenging documentaries. You know the kind. The ones that can deposit you, still in your dressing gown and slippers, into the middle of a sub-Saharan war zone, or a Bolivian coke factory, and deliver a sharp punch to the guts any time your concentration might be in danger of drifting off.
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