Mothers Against Drunk Driving, the local clergy, and the town council had been planning this concept for over a year. Finally they did it: Right in the town square, they installed a giant loudspeaker. From thenceforth, every two minutes, a booming voice would spread all over town, announcing “Are you sure?” Foolhardy decisions, they had decreed, would soon be a thing of the past. The locals seemed to adapt pretty readily.