Daredevil window cleaners add sparkle to the world's tallest building

What does it take to clean the windows of the world’s tallest building, the Burj Dubai? This comedy video brings home the magnitude of the task.

Developed by Emaar Properties, the Burj is about 2,683 ft high (818m) and is thought to have topped out. It has 142,000 sq m of windows…

The Burj Dubai has its windows cleaned