South and north towers of the World Trade Center in New York collapse after planes piloted by Moslem extremists crashed into them. Reactions of New York citizens, witnesses on the scene. Ambulance with revolving lights, people who listen to commentary on the radio. Plume of smoke rising to the sky, people wait in line to use a public telephone. A young man offers free hugs. Keywords: SEPTEMBER 11 ATTACKS,UNITED STATES,NEW YORK (CITY),TERRORISM,AERIAL TERRORISM,WORLD TRADE CENTER