By Dan Gelernter, American Greatness - For four years, the Germans had run Paris with their characteristic and unimaginative efficiency. They put up road signs in German, lined the Rue de Rivoli with swastikas, and switched Paris to Berlin time. And, during those four years, the Germans received more than 2 million tips from Parisians squealing on their neighbors. Reporting so-and-so for buying on the black market. Reporting so-and-so for violating the curfew and staying out too late. Some concierges hid Jewish tenants from the police. Others turned them over and took their apartments