LOS INDIOS, Texas – Photographer Andre Malok and I were three days into traveling the banks of the Rio Grande before we saw any sort of wall along the Mexican border. We finally saw one in McAllen. So did half the TV crews in Texas. It was Thursday, the day President Trump came to this border town to give a speech on his current tiff with Congress over $5 billion in funding for a border “wall” – or “fence” – or whatever. The day before, Andre and I had driven along 150 miles of border without seeing any barriers at...