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Subscribe for more: http://bit.ly/subscribetoGWR The tallest building is a record that is hot property, with countries keen to compete for the latest record. We speak to the Lead Engineer of the Burj Khalifa (at 828m / 2,716ft 6in tall) to discover more about the architecture behind the world’s tallest building and discover what it’s like to work in a building that sits above the clouds… Welcome to the official Guinness World Records YouTube channel! If you're looking for videos featuring the world's tallest, shortest, fastest, longest, oldest and most incredible things on the planet, you're in the right place. LIKE us on Facebook: http://www.facebook.com/GuinnessWorldRecords FOLLOW us on Twitter: http://twitter.com/gwr Find out more: http://www.guinnessworldrecords.com/ Add us to your G+ circles: www.google.com/+guinnessworldrecords