The conversation between human and AI assistant.
What were you doing when you heard about the 9/11 terrorist attacks?
Can you tell me about the events that happened on 9/11?
On September 11, 2001, four planes were hijacked by terrorists who belonged to the extremist group Al-Qaeda. Two planes were flown into the twin towers of the World Trade Center in New York City, causing them to collapse. Another plane was flown into the Pentagon outside of Washington, D.C., and the fourth was believed to be headed toward another target but crashed in a field in Pennsylvania. The attacks resulted in the deaths of nearly 3,000 people.