US-FILES-VERTICAL/WORLD TRADE

(FILES)This file photo taken 26 February 1993 shows firefighters and rescue crews work outside the World Trade Center after smoke swept through the 110-story building after the ceiling of a train station collapsed 26 February 1993. The explosion set off a fire below the twin towers. Earlier 11 September 2001 two separate aircraft flew into the world trade Center buildings in New York in what is suspected to be terroist attacks. AFP PHOTO/MARIA BASTONE