A view of the Burj Khalifa tower in Dubai, United Arab Emirates. The world’s tallest building was opened in a carefully orchestrated ceremony before a crowd of thousands. (Ali Haider / EPA)
An man checks out the city view from the observation deck of the Burj Khalifai tower in Dubai, United Arab Emirates. The 2,717-foot-tall structure has more than 160 stories, the most of any building in the world, and an observation deck on its 124th floor. (Kamran Jebreili / Associated Press)
Workers mill about the Burj Khalifa tower during an early phase of construction in March 2006. At 2,717 feet tall, the world’s tallest building is anticipated to be the focal point of the 500-acre master planned community. (Victor Romero / Associated Press)
