Hundreds of construction workers watched as the last column of the World Trade Center was cut down Tuesday, signaling the conclusion of an eight-month recovery effort, which had continued virtually non-stop since the Sept. 11 terror attacks.

Robert MacNeil reports on a New York Times series remembering those killed at the World Trade Center. The series was part of the Times' "A Nation Challenged" reports, which won a 2002 Pulitzer Prize.

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