James Reynolds at the Iran-Azerbaijan border
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Life on Azerbaijan's tense border with Iran

12 August 2012 Last updated at 01:30 BST

It is one of the most significant and potentially explosive divides in the world.

Azerbaijan - a majority Muslim, secular state with a booming petrodollar economy - shares a 765km (480-mile) border with Iran, the Islamist pariah of the West.

Despite sharing extensive ethnic and historical ties, the two states harbour a deep mistrust of one another, largely due to the close alliance between Azerbaijan and Israel - Iran's bitter enemy.

BBC Iran correspondent James Reynolds took a trip to find out what life is like on the bustling border crossing at Astara, in the south of Azerbaijan. Due to security restrictions, this footage was filmed on a mobile phone.