How many buildings went down 911?

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Tags

1. #burning
2. #flight
3. #explosion
4. #buildings
5. #caused
6. #south
7. #world
8. #collapsed
9. #center
10. #after
11. #induced
12. #three
13. #impact
14. #airlines
15. #united
16. #failure
17. #trade
18. #tower
19. #structural
20. #minutes