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Will Iran's neighbours see post-sanctions boost?

18 January 2016 Last updated at 23:51 GMT

The lifting of international sanctions against Iran is likely to have a significant economic impact beyond its borders, including in Afghanistan.

Banking restrictions, which were imposed under the sanctions, made trading with Iran difficult, but local Afghan economies are confident that business and job opportunities will pick up now they have been lifted.

South Asia correspondent Justin Rowlatt reports from Herat, on the ancient trade route between Afghanistan and Iran.