FILE - In this file photo of Feb. 26, 1993, Victims of a fire at the World Trade Center in New York are treated at the scene after an explosion rocked the complex. Twenty years ago next week, 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/Marty Lederhandler, File)