Richard Faces His Fear Of Heights To Clean The 828 Metre Tall Burj Khalifa | Richard Hammond s Big

Richard Hammond finds out how the windows of the 2,722 ft tall Burj Khalifa gets cleaned the hard way. 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