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

The Defense Department is expanding its border role with a new military zone near Yuma, aiming to boost surveillance as crossings continue to fall.

At least two military vehicles have been spotted in Yuma near the U.S.-Mexico border as security ramps up.

Border patrol agents in Yuma are working with counterparts in Mexico to go after smugglers they believe are tied to drug cartels. Alexandra Rangel reports.

Gunmen opened fire on a Jeep waiting to cross the border into the U.S. A Yuma man was killed. His 1½-year-old child survived the attack unharmed.

The fourth national defense area created along the US-Mexico border will be an extension of Marine Corps Air Station Yuma in the Sonora Desert.

A zone and Trump’s order cover Arizona’s four border counties – Yuma, Pima, Santa Cruz and Cochise – except for a 62-mile stretch of Pima County controlled by the Tohono O’Odham Nation.

Republican attorneys general visit Yuma, Arizona, highlighting a 90% drop in illegal crossings since Trump's second term and the impact of fentanyl trafficking.

As border security increases, two military-style vehicles were spotted along the Arizona-Mexico border near Yuma, part of a joint operation.