NOGALES — Homeland Security Secretary Kristi Noem is set to return to Arizona Feb. 4 to make a major announcement about the border wall. Noem is expected to appear with officials from U.S. Customs and Border Protection and Immigration and Customs Enforcement at the border stop.

Authorities in west Texas and New Mexico are aggressively arresting and prosecuting illegal border crossers in construction zones and for engaging in a common practice at the border: impersonating construction workers.

U.S. Secretary of Homeland Security Kristi Noem, flanked by CBP and ICE officials, announces accelerated border‑wall build in front of existing barrier in Nogales.

The string of orange buoys mimics an earlier effort by Texas Gov. Greg Abbott to wall off the Rio Grande.

The rugged terrain of Mount Cristo Rey has always presented a challenge to Border Patrol agents trying to keep migrants from coming over to this New Mexico community from Mexico.

Two migrants attempted to enter the U.S. by dressing up as construction workers to try to blend with crews in El Paso, U.S. Customs and Border Protection said.

Since Trump returned to office, dozens of environmental, wildlife and public access rules have been waived to make way for the border wall.

Border Patrol set off explosions on Tuesday near Mount Cristo Rey in Sunland Park as construction of the border barrier continues.