4 / 15
FILE - In this file photo of Feb. 27, 1993, police and firefighters inspect the bomb creater inside 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.