epa01979833 Light installations mark the opening ceremony of skyscraper Burj Khalifa in Dubai, United Arab Emirates 04 January 2010. The tallest building in the world was officially inaugurated on 04 January 2010 by Sheikh Mohammed bin Rashid Al Maktoum, the ruler of Dubai. Formerly known as the Burj Dubai thebuilding was officially unveiled as the Burj Khalifa, named after the UAE President. The tower's official height was declared to be 828 metrer, 10 metrer taller than previous estimates had suggested and considerably taller than the previous record holder, Taipei 101. EPA/ALI HAIDER

epa01979848 Light installations and fireworks mark the opening ceremony of skyscraper Burj Khalifa in Dubai, United Arab Emirates 04 January 2010. The tallest building in the world was officially inaugurated on 04 January by Sheikh Mohammed bin Rashid Al Maktoum, the ruler of Dubai. Formerly known as the Burj Dubai, the building was officially unveiled as the Burj Khalifa, named after the UAE President. The tower's official height was declared to be 828 metrer, 10 metrer taller than previous estimates had suggested and considerably taller than the previous record holder, Taipei 101. EPA/ALI HAIDER

epa01979824 Fireworks mark the opening ceremony of skyscraper Burj Khalifa in Dubai, United Arab Emirates 04 January 2010. The tallest building in the world was officially inaugurated on 04 January 2010 by Sheikh Mohammed bin Rashid Al Maktoum, the ruler of Dubai. Formerly known as the Burj Dubai thebuilding was officially unveiled as the Burj Khalifa, named after the UAE President. The tower's official height was declared to be 828 metrer, 10 metrer taller than previous estimates had suggested and considerably taller than the previous record holder, Taipei 101. EPA/ALI HAIDER

epa01979559 A view of the Burj Dubai skyscraper as seen at the Downtown Burj Dubai district of Dubai, United Arab Emirates, 04 January 2010. Burj Dubai, the world's tallest building, will open 04 January in a carefully orchestrated ceremony before a crowd of thousands. Developed by Emaar Properties, Burj Dubai is the focal point of the 500-acre master planned community Downtown Burj Dubai.The exact height of the superscraper

epa01979611 A view of the Burj Dubai skyscraper as seen at the Downtown Burj Dubai district of Dubai, United Arab Emirates 04 January 2010. Burj Dubai, the world's tallest building, will open today in a carefully orchestrated ceremony before a crowd of thousands. Developed by Emaar Properties, Burj Dubai is the focal point of the 500-acre master planned community Downtown Burj Dubai.The exact height of the superscraper

epa01979558 A view of the Burj Dubai skyscraper as seen at the Downtown Burj Dubai district of Dubai, United Arab Emirates, 04 January 2010. Burj Dubai, the world's tallest building, will open 04 January in a carefully orchestrated ceremony before a crowd of thousands. Developed by Emaar Properties, Burj Dubai is the focal point of the 500-acre master planned community Downtown Burj Dubai.The exact height of the superscraper

epa01979568 The shadow of Burj Dubai (C) is cast on a view of Dubai city as seen from floor 124 of the Burj skyscraper during a media tour in Dubai, United Arab Emirates, 04 January 2010. Burj Dubai, the world's tallest building, will open 04 January in a carefully orchestrated ceremony before a crowd of thousands. Developed by Emaar Properties, Burj Dubai is the focal point of the 500-acre master planned community Downtown Burj Dubai. The exact height of the superscraper

epa01979574 Labourers work at the main gate of the Burj Dubai skyscraper at the Downtown Burj Dubai district of Dubai, United Arab Emirates 04 January 2010. Burj Dubai, the world's tallest building, will open 04 January in a carefully orchestrated ceremony before a crowd of thousands. Developed by Emaar Properties, Burj Dubai is the focal point of the 500-acre master planned community Downtown Burj Dubai.The exact height of the superscraper

epa01979614 Two UAE officials walk past in front of the Burj Dubai skyscraper in Dubai, United Arab Emirates 04 January 2010. Burj Dubai, the world's tallest building, will open today in a carefully orchestrated ceremony before a crowd of thousands. Developed by Emaar Properties, Burj Dubai is the focal point of the 500-acre master planned community Downtown Burj Dubai.The exact height of the superscraper

epa01979541 The shadow of Burj Dubai (C) is seen from floor 124 of the Burj, the supertall skyscraper during a media tour in Dubai, United Arab Emirates, 04 January 2010. Burj Dubai, the world's tallest building, will open 04 January in a carefully orchestrated ceremony before a crowd of thousands. Developed by Emaar Properties, Burj Dubai is the focal point of the 500-acre master planned community Downtown Burj Dubai. The exact height of the superscraper

epa01979544 A man has a view of Dubai city from floor 124 of Burj Dubai the supertall skyscraper during a media tour in Dubai, United Arab Emirates, 04 January 2010. Burj Dubai, the world's tallest building, will open 04 January in a carefully orchestrated ceremony before a crowd of thousands. Developed by Emaar Properties, Burj Dubai is the focal point of the 500-acre master planned community Downtown Burj Dubai.The exact height of the superscraper