What is Burj Khalifa famous for?

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Tags

1. #tower
2. #skidmore
3. #designed
4. #records
5. #owings
6. #designation
7. #willis
8. #height
9. #tallest
10. #numerous
11. #trade
12. #broke
13. #building
14. #smith
15. #whose
16. #including
17. #khalifa
18. #center
19. #adrian
20. #world
21. #merrill