Tippy Top.
The Trump Administration started working on the San Diego/Tijuana border (The largest urban area along the US/Mexican border) with the very first Appropriation they got in 2017.
The first fence that Mexicans encounter coming North (called the Primary Barrier), has been completely replaced, from Near the Ocean (the end of the pre-existing bollards) all the way to the mountain East of Otay Mesa. The decaying old landing mat fence is now completely gone, replaced with 18 foot concrete-filled steel bollards, set in deep reinforced concrete foundations at least two feet thick.
This stuff is gone:
Replaced with this:
The prototypes that were built near Otay Mesa to evaluate designs for the wall, have also been demolished:
To make way for a second 14 mile run of mighty 30 foot tall bollards, about 150 feet behind the new 18 foot bollard wall (1 and 1/2 miles of that secondary barrier will close off areas that previously had no secondary barrier at all):
The enforcement zone between these two mighty barriers is being transformed as well. Significant work has been done clearing fields of view, grading to put in higher speed patrol road, Stadium lighting, complete monitoring by fixed cameras, and a suite of sensor and alarm systems. They should start wrapping up the project around Christmas time, this year. The San Diego border is going to be buttoned up like never before. It is quieting down already.