Our final Top 25 list features the biggest news stories of the past quarter-century. They're the ones that generated the largest headlines, the greatest change, the most vivid memories, the most immediate impact. You probably remember where you were when you heard about them. If your list differs, let us know at top25.usatoday.com.

1. Fall of communism (1989)

2. 9/11 terrorist attacks (2001)

3. Iraq war (2003-)

4. Hurricane Katrina (2005)

5. O.J. Simpson (1994-95)

6. 2000 presidential election

7. Clinton impeachment (1998-99)

8. Afghanistan invasion (2001)

9. Oklahoma City bombing (1995)

10. Chernobyl disaster (1986)

11. Columbine massacre (1999)

12. Death of Diana (1997)

13. Asian tsunami (2004)

14Persian Gulf War (1991)

15. Rodney King (1991-92)

16. Branch Davidians (1993)

17. Challenger explosion (1986)

18. Tiananmen Square (1989)

19. Rwandan genocide (1994)

20. Nelson Mandela (1990)

21Iran-contra affair (1986-87)

22. Beirut Marine barracks bombing (1983)

23. Terri Schiavo. (2005)

24. Gay marriage (2003)

25. Pan Am Flight 103 (1988)