"As part of President Trump’s campaign promise to build a wall along the southern border, 14 miles of 18-foot primary steel bollard fencing has been built in San Diego, with a secondary 30-foot steel bollard barrier behind that which is approximately 80 percent complete.
They replace the 8-foot landing mats, which were often supported by a steel mesh behind that. The difference is dramatic.
“It's incredibly different...I’m able to see the old landing mat right next to the bollard and I'm able to see the old mesh right next to the new bollard and the difference is startling,” Douglas Harrison, Chief Patrol Agent of U.S. Border Patrol’s San Diego Sector, told Fox News."
The same cause and effect was documented in Yuma, Arizona thirteen years ago. To quote the late Charles Krauthammer, "If fences don't work, why is there one around the White House?"
H/t: Maggies Farm