For the first time since taking office, President Donald Trump will visit the U.S.-Mexico border in an area where officials say building more fence has strengthened border security.

Trump will get a first-hand look at issues that were the centerpiece of his presidential campaign: combating illegal immigration and building a “great, great wall” on the southwestern border.

The president will tour a port facility and see a predator drone, Border Patrol river patrol boat, and surveillance truck. 

Customs and Border Protection officials said the visit will allow the president to see successes and challenges to border enforcement. This section of the nearly 2,000-mile international boundary crosses varied topography — desert mountain ranges, agricultural valleys, the Colorado River, and sand dunes.