Rugged mountain ranges in southeastern Arizona halted the march of a steel border wall during the first Trump presidency.

The Department of Homeland Security takes steps that it says will allow for the immediate construction of about 2.5 miles of ...

President Trump has so far failed to secure funding for his long-promised wall along the U.S.-Mexico border, so now his most ardent supporters are trying to pay for it themselves. But it's still ...

To the east: a border wall stretching for 70 miles from the foothills almost to New Mexico blocks the path of these rarest of American mammals, especially at what might otherwise be prime cat ...