The changing fabric of America’s cities is stripping away culture and memories — as well as control, again, from Black communities who have been historically devalued. — “C’mon in, hun,” a man relaxing in a folding chair out front called as I rolled up. Inside the small auto shop office, three or four people hovered over the desk — covered not with tools and parts, but with plastic bags of napkins, styrofoam plates, tubs of potato salad…