Trump announced in 2001 that the skyscraper would become the tallest building in the world , but after the September 11 attacks that same year , he scaled back the building 's plans , and its design underwent several revisions . When topped out in 2009 , it became the fourth-tallest building in the US . It surpassed the city 's John Hancock Center as the building with the highest residence ( apartment or condo ) in the world , and briefly held this title until the completion of the Burj Khalifa
September 11 attacks
September 11 attacks
Trump International Hotel and Tower (Chicago)