US: Border tunnel found appears to be ‘most sophisticated’

The tunnel intended for smuggling ran from San Luis, Arizona, to a Mexican neighborhood and had a ventilation system, water lines, electrical wiring, a rail system, and extensive reinforcement, federal officials said Thursday.

President Trump's visit to Arizona marked by border visit, Phoenix event, protest

First, the president will travel to Yuma to mark the construction of more than 200 miles (322 kilometers) of wall along the U.S.-Mexico border, an issue that he built his campaign on four years ago. Later, he’ll address a group of young Republicans at a Phoenix megachurch, where event organizers have pledged thousands will attend.