The Border Patrol reinforced the border wall with wire in urban areas near ports of entry in Nogales and San Luis.

Winding highways connecting big cities, small towns, and natural wonders crisscross the terrain, which jumps from high mountains to red rock arches ... from the Arizona-New Mexico border.

PHOENIX— Conservation groups and business leaders urged a federal commission today to deny a preliminary permit for a 200-foot-tall dam planned for the San Francisco River at the Arizona-New Mexico ...

The multidisciplinary group of scientists compared 12 habitat models for jaguars in Arizona and New Mexico and found an area of habitat the size of South Carolina, roughly 100 miles from the southern ...

setting up a tense 2025 at the southern border New film claims 'Napalm Girl' photo credited to wrong journalist A meteorite 100 times bigger than the dinosaur-killing space rock may have nourished ...