The United States’ southern border with Mexico is 1,933 miles long ... The Rio Grande and the rugged terrain around the river serve as a natural barrier. In between, there’s an assortment ...

Such a precision piece of geography stands in stark contrast to the natural boundaries often determined by rivers and mountain ranges. The length and straightness of this border make it a ...

The two cities are separated by the upper Bermejo River which poses as a natural border between the two countries. The people of Salta “will recover their streets and their borders because drug ...

The Natural Resurces Subcommittee on Federal Lands met to discuss H.R. 1820, the “Federal Lands Amplified Security for the ...

They are separated by the upper Bermejo River, which runs along southern Bolivia and northern Argentina, thus becoming a natural border between the two countries. The Argentine official was ...