Dubai likes to set records. It has the world's tallest building (the Burj Khalifa), the largest shopping centre (the Dubai Mall) and the longest handmade gold chain (5.52km), to name but three. But beyond mere ostentation, the city-state has more substantial achievements to its credit. In the year to September Dubai airport overtook Heathrow in London to become the world's busiest international hub, with some 68.9m passengers using it yearly.
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