The Burj tower in Dubai, United Arab Emirates, still under construction, is seen in a Friday, Aug. 17, 2007 file photo. The Burj will become the world's tallest building by next year. The Burj Dubai surpassed Canada's Toronto-based CN Tower on Thursday, Sept. 13, 2007, which at 555.3 meters (1,822 feet), had been the world's tallest free-standing structure since 1976, the developers said in a press release. (AP Photo/Kamran Jebreili, File)
