Completing two 500-foot tall buildings in White Plains, NY provided them with the credentials to bid and then contract the concrete work for the “Building 4” project at the World Trade Center.

The Chicago Spire, the fourth tallest project on the list ... The report concludes that at the moment 50 buildings taller than 150 metres (500 ft) are on hold in the world.

Business Insider rounded up the most expensive towers built in the last 20 years, defining a skyscraper as a building that measures at least 500 feet tall. As you will see, not all skyscrapers ...