How The Burj Khalifa Is Dubai s Lighting Rod | Richard Hammond s Big

The Burj Khalifa is the tallest building in the world, which brings some challenges when it comes to maintenance. Richard joins an engineer as he travels right to the top of the spire to change a very important battery. Subscribe to Discovery UK for more great clips: http://www.youtube.com/subscription_center?add_user=DiscoveryTV Follow Discovery UK on Twitter: http://www.twitter.com/DiscoveryUK