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Tiny speck is skyscraper king climbing world's tallest tower

A skyscraper daredevil climber has scaled the world's tallest building in Dubai.

Alain Robert's climb up the 2,717ft (828m) Burj Khalifa yesterday took just over six hours. As night fell, a row of powerful spotlights shone on the side of the tower as Robert climbed.

Unlike on many previous climbs, the 48-year-old daredevil who calls himself Spiderman used a rope and harness to comply with organisers' requirements in the Gulf sheikhdom.

Robert has climbed more than 70 skyscrapers, including the Empire State Building, Chicago's Willis Tower and the Petronas Towers in Kuala Lumpur.

He conquered Taiwan's Taipei 101, which before the Burj was the world's tallest building, in 2004.

The tower has 160 habitable stories and an observation deck is located on the 124th floor.

Viewed from the ground, Robert appeared as a tiny dot difficult to follow in the darkness.

Robert's climb was dubbed "momentous" by onlookers who craned their necks to windows to watch the death-defying feat.