Audie Cornish talks to Philip Zelikow, the former executive director of the 9/11 Commission. She then talks to NPR's Robert Smith who is on the streets of New York City among the many people drawn to lower Manhattan; Daniel Libeskind, the master planner for the World Trade Center site.
France is marking the anniversary with an event in Paris described as the largest commemoration outside the U.S. French President Nicolas Sarkozy said America and its allies emerged victorious after the attacks.
Between the skyscrapers of lower Manhattan, along the concrete walls of the Pentagon and amid the trees in rural Shankesville, Pa., ceremonies are being held Sunday to mark the attacks of Sept. 11, 2001. A full decade after the events that are now often boiled down to just two numbers — 9, 11 — it can be difficult to remember the before. Audie Cornish then talks to NPR's Robert Siegel and Tom Gjelten about the ceremonies marking the day.