Why planes do not fly over Tibet?

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Tags

1. #tibet
2. #cabin
3. #where
4. #supposed
5. #route
6. #altitude
7. #himalayas
8. #descend
9. #pressure
10. #there
11. #remote
12. #planes
13. #added
14. #airplane
15. #enough
16. #geography
17. #breathe