More than a decade after a terrorist attack brought down New York's twin towers, their under-construction replacement will become the city's tallest building on Monday.

The placement of a column of the 100th floor will bring the colossal new steel structure of One World Trade Center tower to a height of 1,271 feet – surpassing the frame of the Empire State Building, which is currently New York's tallest skyscraper, by 21 feet. — news.blogs.cnn.com

Forget Facebook, I've got a whole new IPO for you. The owners of the Empire State Building filed papers to go public this week. — marketplace.org

It’s official — the Empire State Building has been awarded LEED Gold certification. Thanks to a massive green overhaul that took more than two years, the landmark is now the tallest building in the United States to receive LEED certification. — Inhabitat