Pictures A Look At The World's Tallest Skyscraper March 28, 2011 / 1:55 PM CDT / CBS News (credit: MARWAN NAAMANI/AFP/Getty Images) Burj Khalifa (credit: MARWAN NAAMANI/AFP/Getty Images) Burj Khalifa (credit: KARIM SAHIB/AFP/Getty Images) Burj Khalifa (credit: MARWAN NAAMANI/AFP/Getty Images) Burj Khalifa (credit: MARWAN NAAMANI/AFP/Getty Images) Burj Khalifa (credit: JOEL SAGET/AFP/Getty Images) Burj Khalifa (credit: KARIM SAHIB/AFP/Getty Images) Burj Khalifa (credit: JOEL SAGET/AFP/Getty Images) Burj Khalifa (credit: JOEL SAGET/AFP/Getty Images)