Members of Mexico’s National Guard and Federal Police patrol the U.S.-Mexico border to prevent migrants from crossing from Ciudad Juárez. Residents and officials say they’ve never before seen a deployment of Mexican military forces on the northern border.

Members of Mexico’s National Guard and Federal Police patrol the U.S.-Mexico border to prevent migrants from crossing from Ciudad Juárez. Residents and officials say they’ve never before seen a deployment of Mexican military forces on the northern borde