Sometime after the Oklahoma City bombing of the Federal Building there, I saw concrete barricades go up around the Federal Building in downtown Phoenix. At that time they were those ugly concrete barriers we see on the sides of roads during construction activity. Since that time the barriers have been converted into an attractive arrangement of concrete posts topped with concrete balls.
In between the concrete posts are steel beams and seats for people to use as a place to rest. I hate the thought that these are necessary but I'm glad they have been constructed in a way that is both appealing to the eye and useful.