World’s tallest building opens in Dubai
The world's tallest building has been opened with a dramatic fireworks ceremony in the Gulf emirate of Dubai.
The Burj Khalifa was revealed to be 828m (2,716ft) high, far taller than the previous record holder, Taipei 101.
Known as the Burj Dubai during construction, the tower has been renamed after the leader of Dubai's oil-rich neighbour, Abu Dhabi.
Last month, Abu Dhabi gave Dubai a handout of $10bn (£6.13bn) to help it pay off its debts.
Construction of the Burj Dubai began in 2004, at the height of an economic boom.