AP: Very few residents dare to drive on one of the roads out of this watering-hole for migrants, fearing they will be stopped at gunpoint. They worry they will be told to turn around after their gas tanks are drained or, worse, be kidnapped or killed. A shootout that left 21 people dead and six wounded on the road last week is the most gruesome sign that a relatively tranquil pocket of northern Mexico is quickly turning into a hotbed of drug-fueled violence on Arizona's doorstep. The violence in recent months is grist for supporters of the state's tough new law against illegal immigration, who are eager to portray the border as a lawless battlefield of smugglers both of drugs and humans.