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In many parts of the world, charities are trying to deliver much-needed aid to desperate people living in areas controlled by militant groups. What do they do when counter-terrorism laws ban them from contact with those de facto authorities?

Risk of prosecution has now created a climate of fear in many aid agencies - and the UN wants counter-terrorism policies redrawn to ensure lives can be saved without charity workers risking jail.

Tim Whewell reports from Gaza - and talks to aid workers operating in Syria, Somalia and other places - on the practical and moral dilemmas involved.

Producer: Paul Grant.