There was a study in the '90s in which people had to envision a drug user, then describe the person they had envisioned. Ninety-five percent envisioned someone black. This, even though only about 15 percent of drug users actually are black. The point being that in the public mind, certain terms -- "urban," "poverty," "crime" -- carry racial weight, often at odds with reality. They are ways of saying "black" without saying "black."