Graffiti depicting the old South Yemen flag
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Yemen: Five facts in 45 seconds

Yemen has been at the crossroads of Africa, the Middle East and Asia for thousands of years thanks to its position on the ancient spice routes.

The modern Republic of Yemen was born in 1990 when traditional North Yemen and Communist South Yemen merged after years of clashes.

But recent years have seen further unrest and warring factions.

BBC News has these essential facts.

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