FILE - In this Feb. 26, 1993 file photo, a police officer assists a survivor of the World Trade Center terrorist bombing in New York. On Friday, Feb. 26, 2016, a ceremony commemorating the 23rd anniversary of the 1993 World Trade Center bombing that killed six people and injured more than 1,000, will be held in New York. (AP Photo/Marty Lederhandler, File)