Sidewalks are under assault as the maintenance season (aka summer) approaches. Every year, the harsh weather of winter and the thaw of spring do a serious number on the roads, pipes, and wires around the city. And every summer, workers and machinery pop up like mushrooms, clustered around the most damaged parts of the city. And every fall, the workers and machinery disappear, revealing a healed city, ready to face the ravages of winter once again. I can't decide if this is comforting, or frustrating....