Staff from the Center for Biological Diversity documented Monday that construction has begun on a new segment of border wall ...

The San Rafael Valley is a stretch of borderland dotted with towering mountain peaks called sky islands — where vastly ...

Claims by Tucson-based conservation groups that an expanded border wall could put an end to jaguars in Arizona are trumped by ...

Arizona GOP leaders seek $744M border reimbursement from Trump after spending on container wall and law enforcement efforts ...

The nation's top homeland security official says she has the right to build new sections of border wall — even though it ...

The nation's top homeland official says she has the right to build new walls along nearly 40 miles of the border, regardless ...

Rep. Cory Mills (R-Fla.) on Wednesday introduced a bill to make the wall on the U.S.-Mexico border a national monument, ...

Much has been written about building a southern border wall to stop immigration. But while the fight over black paint, bricks ...

This wall would slice the heart out of Arizona’s Sky Islands, blocking jaguars and ocelots from reaching the resources and ...

The nation’s top homeland official says she has the absolute right to build new walls along close to 40 miles of the border ...