Twenty-five years after the Sept. 11 attacks destroyed the World Trade Center, reconstruction of the 16-acre ground zero site remains incomplete. Three of four planned skyscrapers are finished and occupied; the fourth is finally under construction. The attacks initially sparked fears that Lower Manhattan, supertall towers, and even New York itself were finished, but the city roared back, building six new skyscrapers taller than the original twins, including the 1,776-foot One World Trade Center designed by David Childs of Skidmore, Owings & Merrill.

Master planner Daniel Libeskind envisioned a suite of four descending towers, but his shard-like designs were discarded for commercial architects like Norman Foster, Richard Rogers, and Fumihiko Maki. Childs's tower retains symbolic prominence but falls short of its potential: the NYPD mandated a concrete bunker for the first 20 floors, and a sculptural antenna enclosure by Kenneth Snelson was cut to save money.

The rebuilding missed a chance to advance skyscraper innovation. The U.S. invented the skyscraper, yet the replacement towers reflect 1960s thinking rather than modern engineering, sustainability, or urban livability. Crucially, planners failed to anticipate residential demand, assuming no one would want to live at ground zero. Yet Lower Manhattan normalized, proving urban fundamentals endure beyond tragedy.