Managers of German conglomerate ThyssenKrupp enter the company's headquarter in the western German city of Duisburg May 31, 2012. Duisburg and other nearby cities once were the core of Germany's coal mining and steel producing Ruhr region, but are struggling heavily in debt due to falling steel prices and Germany's highest unemployment rate in the west of the country. REUTERS/Wolfgang Rattay (GERMANY - Tags: BUSINESS COMMODITIES LOGO)