So, what is the tallest building in the U.S. and what are its closest competitors? Each towering skyscraper tells a story. From New York's One World Trade Center to Chicago's Willis Tower ...

Within a three-week period, Adrian Smith sketched out the original designs that would eventually become the tallest building in the world, the Burj Khalifa. In the early 2000s, he was approached ...

In Milwaukee, plans are in the works for two tall mass timber-concrete hybrid buildings, including one that could become the world's tallest.