A Hero Ain't Nothin' but a SandwichBy: Alice Childress Benjie can stop using heroin anytime he wants to. He just doesn't want to yet. Why would he want to give up something that makes him feel so good, so relaxed, so tuned out? As Benjie sees it, there's nothing much to tune in for. School is a waste of time, and home life isn't much better. All Benjie wants is for someone to believe in him, for someone to believe that he's more than a thirteen year old junkie. Told from the