On The Trail: Big Bend, a national treasure shared with Mexico

Over the last few months, there's been a lot of talk about walls on the U.S.-Mexico border. Conor Knighton, "On The Trail" again, as part of "Sunday Morning"'s celebration of the National Park Service's centennial, takes us to Big Bend, the national park along the border whose natural walls are stunning to behold.

Видео On The Trail: Big Bend, a national treasure shared with Mexico канала CBS Sunday Morning