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

The U.S. Army will take control of almost 110,000 acres of federal land along the U.S.-Mexico border to support Border Patrol ...

President Donald Trump has greenlit the transfer of the Roosevelt Reservation — a stretch of federal land that runs along the ...

Rugged mountain ranges in southeastern Arizona halted the march of a steel border wall during the first Trump presidency. Wildlife advocates say it shows the importance of animal travel routes.

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 ...