It was a mostly empty parking lot staged to look like she was crying in front of a bunch of "kids in cages," and the fence just ends behind where the photographer is standing. Trump was still in office when this happened, so it's not exactly recent.
Here's another angle:
https://i.imgur.com/1Rq3qsY.png
https://i.imgur.com/vwCFTEw.jpg
But you knew all of this already.