Captain William Bill Pinkney tells us the story that as a young boy growing up in the part of Chicago called Bronzeville, he was made aware of a depressing statistic: Before I would turn 21, the chances were that I would be on drugs, in jail, or dead from crimes of violence. That was because I was a black male, educated in the public school system, raised partially on welfare, and brought up by a divorced woman. Pinkney beat the odds because my mother...