"Today the United Arab Emirates achieves the tallest building ever created by the hand of man... and this great project deserves to carry the name of a great man. Today I inaugurate Burj Khalifa," Sheikh Mohammad said.
The financially troubled Gulf emirate of Dubai has opened the world's tallest building, a glistening concrete, glass and steel pinnacle rising 828 metres out of the desert sands.
Blazing fireworks rippled up and down the massive structure after it was officially opened by Dubai ruler Sheikh Mohammad bin Rashed al-Maktoum.
He renamed the building, previously known as Burj Dubai, Burj Khalifa in honour of United Arab Emirates President Sheikh Khalifa bin Zayed al-Nahayan.