Just as Justin Timberlake brought sexy back, Burj Khalifa architects Skidmore, Owings & Merrill have declared that “tall buildings are back.” After 6 years of construction and $1.5 billion, the Burj Khalifa (or Burj Dubai as it was known 5 minutes ago) is now the world’s tallest building, standing at 828 meters or about half a mile high (2,717 feet to be exact). The inauguration took place today, where the height of the building was revealed to the public and a last minute name change. 
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