Have you ever wondered how the world's tallest tower weathers sandstorms, rains and heavy winds, and bears stunning graphics on New Year's eve? Have you thought how the workers and engineers keep Dubai's iconic tower sparkling bright all year round? How do the workers identify which particular spot at the exterior needs fixing? A team of specialised engineers revealed all these facts and more on the LED exterior facade of Burj Khalifa. This video is all you need to know about the largest LED screen in the world covering the tallest building. WATCH: