Looking at dunes and other rock formations on both Earth and Mars can tell scientists the environmental conditions that created them ...

U.S. troops are sharing command stations and vehicles with civilian immigration authorities at the southern U.S. border.

In Arizona, Republican lawmakers introduced Senate Bill 1109 in February to block land sales to foreign adversaries near ...

The Trump administration banned Chinese investors from owning land near U.S. military sites, using an overstated map of their ...

U.S. troop deployments at the border have tripled to 7,600 and include every branch of the military - even as the number of attempted crossings plummet.

Yuma Border Patrol confirmed the proposed National Defense Area will span much of the city’s east side, with military support ...

If Yuma's lettuce fields dry up, Americans won't just lose fresh greens in the winter. They'll lose a key part of our food ...