Burj Dubai Now Burj Khalifa

The world's tallest tower, 'Burj Khalifa' is 828 metres (2,716.5 ft) high

Dubai, UAE; January 4, 2010: The world's tallest tower, developed by Emaar Properties, was unveiled tonight to a crowd of thousands and the world in a crescendo of fireworks, lasers and fountain displays. The official height of the tower, unveiled as 'Burj Khalifa', was announced as 828 metres (2,716.5 ft).

A closely guarded secret, the official height of Burj Khalifa was flashed onto a giant screen before an estimated crowd of more than 400,000, as lasers andfireworks lit up the night