Construction anon here
These columns have been attacked from both sides.
Column 1 with a saw from both sides
Column 2 with a torch.
Possible to do it from one side but a sand filled bollard like this would be at least an hour per cut
Column 3 with a saw from two angles.
It's possible to do this from one side but only after the first bollard is removed.
The best tool to do this would be pic related but it has a max 10 inch deep cut and an 8 inch bollard lie this is over 11 inches deep across the hypotenuse.
Additionally, it would create a shower of sparks that you could see for a half mile.
These saws are heavy =/- 40# and the cuts would take (best case) 10 minutes per side or 40 minutes per bollard IF you could get to all four sides.
DHS got through, but they didn't get through like traffickers would have to do it.
I could do it from one side with sufficient time and proper equipment, but even with max resources, at least an hour to make a crawl through sized hole.
Surely that's enough of a delay for our guys to get there and shoot them in the head.