NEW YORK, NY - Four World Trade Center stands 978-feet high. A ribbon-cutting ceremony was held to celebrate the opening. The official opening means it can start building out its new office space.
4 World Trade Center has 72 stories and 2.3 million square feet of office space in the glass building.
The Port Authority of New York and New Jersey will move in by 2015. The authority lost its home in the twin towers during the 2001 terror attacks. The only other tenant so far is the human resources administration for the city of New York.
Officials say 40 percent of the tower, which is the second largest at the site after the still unopened one world trade, remains open for lease.
Four World Trade is designed by Fumihiko Maki. It faces the September 11 memorial's south reflecting pool.
4 world trade has the largest lobby by volume in all of New York City. The artwork inside is waterfalls and trees, some of the symbols of the September 11 memorial.
The new tower also stands near 1 World Trade Center, sometimes called the Freedom Tower. That tower was declared the nation's tallest this week and is expected to open in 2014.