Across
- 2. Towers, iconic buildings destroyed in the attacks
- 3. Extremism, ideology behind the attacks
- 4. Ninety-three, crashed in Pennsylvania after passengers fought back
- 7. Bush, US president during the attacks
- 8. phrase used to commemorate the attacks
- 11. Bin Laden, al-Qaeda leader behind the attacks
- 12. Effort at Ground Zero after the attacks
- 14. Displayed by many during and after the attacks
- 16. Hijackers who carried out the attacks
- 18. Also struck by a hijacked plane
Down
- 1. Pennsylvania, site of the Flight 93 crash
- 5. Ninety-three, flight number of the plane that crashed in Pennsylvania
- 6. Built at the World Trade Center site
- 9. Giuliani, mayor of New York City during the attacks
- 10. Trade Center, complex targeted in the attacks
- 13. Responders who rushed to help victims
- 15. On Terror, launched in response to the attacks
- 17. Eleventh, date of the attacks
- 19. Zero, site of the World Trade Center collapse
- 20. York City, location of the World Trade Center