When was the Mexican border wall started?

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Tags

1. #patrol
2. #mexico
3. #border
4. #states
5. #fourteen
6. #fencing
7. #erect
8. #sector
9. #background
10. #diego
11. #erected
12. #began
13. #tijuana
14. #along
15. #united
16. #barriers
17. #under
18. #first
19. #california
20. #physical
21. #miles
22. #built