How many border crossings are there between the US and Mexico?

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Tags

1. #border
2. #entry
3. #crossings
4. #world
5. #separating
6. #ports
7. #international
8. #frequently
9. #states
10. #mexico
11. #taking
12. #united
13. #legal
14. #there
15. #boundary
16. #place
17. #million
18. #approximately
19. #annually
20. #crossed