Remembering 9/11: Where tragedy left its marks

Twenty-five years after September 11, correspondent Lee Cowan talks with people forever touched by the terror attacks, including Harry Handler, who helped a woman escape the North Tower of the World Trade Center; Marine Major Dan Pantaleo, who rushed to rescue survivors, and remove remains, from the Pentagon; and Laurel Homer, who was 10 months old when her father, First Officer LeRoy Homer Jr., was killed when Flight 93 crashed in Shanksville, Pa.

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