What caused USS Iowa explosion?

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Tags

1. #cause
2. #exploded
3. #killing
4. #powder
5. #never
6. #mysteriously
7. #turret
8. #explosion
9. #determined
10. #theory
11. #triggered
12. #dozens
13. #american
14. #officially
15. #battleship
16. #overramming
17. #sailors
18. #leading
19. #april