This might be notable.
https://twitter.com/BensmanTodd/status/1071210710095618048
> The commanding military officer over military police migrant-recovery operations in Panama’s Darien region told me: 700 migrants a week from Colombia including many “Syrians,” “Pakistanis,” and from all countries of the “Middle East.” Said 70,000 caught 2015-2017 alone.
Darien is the part of the Panama-Colombia border that they couldn't build a highway through. It's 60 miles of wilderness.
https://www.cbsnews.com/news/darien-gap-dead-end-desperate-journey/