Chairs stand on tables in an empty classroom during a Germany-wide strikes of public sector workers, at a school in Berlin March 11, 2015. German schools, kindergartens, hospitals and some regional airports were hit by strikes on Wednesday ahead of a third round of wage talks between trade unions and state officials.The trade unions are demanding a 5.5 percent pay rise for some three million civil servants in Europe's biggest economy. REUTERS/Stefanie Loos (GERMANY - Tags: CIVIL UNREST BUSINESS EMPLOYMENT)