Six Decades of World History

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Across
  1. 3. 2004  Boxing Day natural disaster (7)
  2. 4. 2015  This country went into a national debt crisis (6)
  3. 6. 1977  This disease was finally eradicated (8)
  4. 9. 2001  Attacked on September 11 (4,6)
  5. 13. 1959  Mattel launches this popular girls' toy (6)
  6. 15. 1974  This army was discovered (10)
  7. 18. 1994  This tunnel was opened (7)
  8. 21. 1958  A very sticky invention (5,4)
  9. 22. 1986  Catastrophic nuclear accident (9)
  10. 23. 1958  This lady was born (9)
  11. 26. 1963  This US president was assassinated (3)
  12. 27. 1985  Discovery of this sunken ship (7)
  13. 28. 1976  First flight of this plane (8)
Down
  1. 1. 1960s  The Fab Four (7)
  2. 2. 1989  This wall came down (6)
  3. 5. 1998  This search engine was created (6)
  4. 6. 1977  This sci-fi movie premiered (4,4)
  5. 7. 1990  This invention by Sir Tim Berners-Lee (1,1,1)
  6. 8. 1990  This telescope was launched (6)
  7. 10. 1973  Opening of this iconic Australian building (5,5)
  8. 11. 1974  US political scandal (9)
  9. 12. 1969  Music festival (9)
  10. 14. 1969  First man on the moon (9)
  11. 16. 2004  Creation of this social networking website (8)
  12. 17. 1986  This comet passed by earth (7)
  13. 19. 1958  US space program launched (4)
  14. 20. 1963  He had a dream, Martin .... King Jr (6)
  15. 24. 1967  Christiaan Barnard performed the first transplant of this organ (5)
  16. 25. 1979  Britain's first female prime minister, Margaret .... (8)
  17. 29. 2000  Australia hosted these games (7)