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Zoonar/Erich Meyer, Zoonar GmbH / Alamy / Profimedia Burdž Kalifa
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Hamdi Bendali / Alamy / Profimedia Burdž Kalifa
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Jim Varley Photography / Alamy / Profimedia Burdž Kalifa
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FADEL SENNA / AFP / Profimedia Burdž Kalifa
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David Davies / PA Images / Profimedia Burdž Kalifa