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 ...