(Btw. we also have the siren going off. A lot of these had been dismantled after the fall of Eastern Germany - they were there to warn us about an attack from the West, you see. I've always said to attack on Wednesdays on 1 PM would be the perfect cover! But in recent years many got re-installed as it was found out they need a warning system against floods)
The same page then told me I'd also be interested in France built a Replica of Paris in WWI A fake city complete with train and lights for the Germans to bomb. Brilliant! (and I'm saying that as a German) Let's all create fake cities so that those that feel the need to drop a bomb once in a while have a playground!