Two of the planes were intentionally crashed into the two World Trade Center towers. It was the first plane that hit the World Trade Center. Hide Caption 3 of 31 Photos: Timeline of the September 11 attacks Fire and smoke are seen from the north tower. Hide Caption 11 of 31 Photos: Timeline of the September 11 attacks Firefighters try to control the flames at the Pentagon. Hide Caption 24 of 31 Photos: Timeline of the September 11 attacks People in New York navigate through a dust cloud.

Source: CNN September 10, 2016 13:52 UTC