U.S. Agriculture Secretary Brooke Rollins closed the border to Mexican cattle for a second time after new reports of screwworm infestations.

The 80th anniversary of the Trinity Test arrives in New Mexico at a poignant moment in New Mexico’s nuclear legacy.

PHOENIX (AP) — Adelita Grijalva won the Democratic primary Tuesday for a southern Arizona U.S. House seat long held by her father, the late U.S. Rep. Raúl Grijalva, one of the most senior and ...

The first military zone, set up along a 170-mile stretch of border in New Mexico in April, came days after an executive order ...

Arizona Attorney General Kris Mayes has sounded the alarm over a growing threat at the southern border — drones being used by ...

More Americans are now eligible for compensation for health problems linked to radiation exposure from the atomic weapons ...

Arizona’s 7th Congressional District covers parts of Tucson, 300 miles of the Arizona-Mexico border and reaches into parts of ...

A meteorite that struck near Winslow, Arizona, about 56,000 years ago may have triggered a massive landslide in the Grand ...

A new study has revealed the formation of the Grand Canyon may be tied to the creation of another Arizona landmark.

5. Iowa: Yes, Iowa! The Hawkeyes will be led by quarterback Mark Gronowski, the former FCS player of the year, two-time national champion and 42-5 starter at South Dakota State. He’s Iowa fans’ reward ...

A Pakistani national indicted in an alleged human smuggling ring appeared in a federal courthouse in Tucson on Tuesday.

Voters in Southern Arizona have casted ballots to select nominees to succeed one of the most senior and progressive power ...