Back in 2012 I wrote post on the proliferation of "defensive" architecture in the neighborhood, especially fences, barbed wire, and security cameras. You can read it here if you like. I recently saw another good example of security overkill on Greenleaf. This fencing protects a tiny parking lot for the former Jewel Laundry (now Ethiopian Cultural Center) just to the east. They use barbed wire to keep the razor wire in place. The tower in the background was part of the original heating plant, although it looks like the height was reduced at some point.