Is Captain America's shield made of vibranium?

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Tags

1. #compound
2. #avengers
3. #ultimate
4. #bearing
5. #shaped
6. #throughout
7. #loosely
8. #after
9. #based
10. #adamantium
11. #captain
12. #america
13. #animated
14. #movie
15. #world
16. #vibranium
17. #triangular
18. #shield
19. #present
20. #gaining
21. #awoke
22. #ultimates