Touring the Mexican-USA border

A couple of guys toured the length of the USA-Mexico border, one on each side of it, and posted photos at the link below. One might be forgiven for thinking that the border is fairly well guarded with the fence and patrols already in place.

https://www.theatlantic.com/photo/2017/02/ten-days-along-the-border/517620/?utm_source=nl-atlantic-daily-022317