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    FILE - In this file photo of Feb. 26, 1993, a New York City police officer leads a woman to safety following a bomb blast at the World Trade Center. Twenty years ago a group of terrorists blew up explosives in an underground parking garage under one of the towers, killing six people and ushering in an era of terrorism on American soil. (AP Photo/Alex Brandon, File)

    FILE - In this file photo of Feb. 26, 1993, a New York City police officer leads a woman to safety following a bomb blast at the World Trade Center. Twenty years ago a group of terrorists blew up explosives in an underground parking garage under one of the towers, killing six people and ushering in an era of terrorism on American soil. (AP Photo/Alex Brandon, File)

    NYC marks 20th anniversary of World Trade Center bombing

    A ceremony honoring six people who died 20 years ago

    in the first terrorist attack on the World Trade Center was held Feb. 26 at the 9-11 memorial, where the twin towers were destroyed eight

    years later. More than 1,000 people were injured in the 1993 blast in an underground garage

    below one of the towers.