Somerville, Massachusetts, United States Columbus, Ohio, United States Clarksburg, Maryland, United States Beaverton, Oregon, United States Wertheim, Baden-Wurttemberg, Germany Wertheim, Baden-Wurttemberg, Germany Claye, Seine-et-Marne, France Mantova, Mantova, Italy Talke, Staffordshire, United Kingdom Laakdal, Antwerp, Belgium