"Good fences make good neighbors"-so goes the proverb. But what makes a good fence? Certainly not one that prevents neighbors from being seen in the first place. Indeed, such divisive barriers create enemies. Peace starts where walls fall, not where they are erected. The Berlin Wall is the best proof of that, says Kai Wiedenhöfer, who witnessed its fall first hand. Wiedenhöfer has photographed separation barriers throughout the world, from Berlin in 1989, to Belfast, Mexico, Ceuta and Melilla, ...