NEW YORK (CBSNewYork/AP) — Thirteen years after the 9/11 terrorist attack, the resurrected World Trade Center has opened for business.

Some of publishing giant Conde Nast’s staffers began working at One World Trade Center on Monday. The 104-story, $3.9 billion skyscraper is America’s tallest building.

“One World Trade Center serves as a symbol of the resilience of the people of New York,” Gov. Andrew Cuomo said in a statement. “Today, as we open its doors for the first time, we remember that strength and courage will always conquer weakness and cowardice, and that the American spirit, defended by proud New Yorkers, will not be defeated.”

It’s the centerpiece of the 16-acre site where the decimated twin towers once stood and where more than 2,700 people died on Sept. 11, 2001, buried under smoking mounds of fiery debris.

“The New York City skyline is whole again, as One World Trade Center takes its place in Lower Manhattan,” said Patrick Foye, executive director of the Port Authority of New York and New Jersey that owns both the building and the World Trade Center site.