The world's tallest building

Burj Khalifa , the world's tallest building during the official opening ceremony in Dubai, United Arab Emirates, Monday, Jan. 4, 2010



Emirati officials prepare for the opening of Burj Khalifa , the world's 828 meter tallest building during the official opening ceremony in Dubai, United Arab Emirates, Monday, Jan. 4, 2010.


The Burj Khalifa , the world's 828 meter tallest building is illuminated during the official opening ceremony in Dubai, United Arab Emirates, Monday, Jan. 4, 2010.


Fireworks light up, Burj Khalifa , the world's tallest building during the official opening ceremony in Dubai, United Arab Emirates, Monday, Jan. 4, 2010.


photo: AP