5 / 15

FILE - In this file photo of Feb. 27, 1993, a crater is exposed in an underground parking garage of New York's World Trade Center the day after an explosion tore through it. Twenty years ago a group of terrorists blew up explosives under one of the towers, killing six people and ushering in an era of terrorism on American soil.(AP Photo/Richard Drew, File)

FILE - In this file photo of Feb. 27, 1993, a crater is exposed in an underground parking garage of New York's World Trade Center the day after an explosion tore through it. Twenty years ago a group of terrorists blew up explosives under one of the towers, killing six people and ushering in an era of terrorism on American soil.(AP Photo/Richard Drew, 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.