1. What were the targets of the terrorist attacks on September 11, 2001?
2. How were the hijackers able to carry out the attacks on the Twin Towers and the Pentagon?
3. What impact did these attacks have on the United States and the world?
4. How did the events of 9/11 change U.S. policies and security measures?
5. How do people commemorate and remember the events of September 11th today?