Former Lufthansa Chief Executive Wolfgang Mayrhuber (L) shares a laugh with Honorary Chairman of Lufthansa's Supervisory Board Wolfgang Roeller during their general meeting in Cologne May 7, 2013. Mayrhuber is back in the running to become supervisory board chairman of Lufthansa, Germany's biggest airline, after overcoming shareholder opposition to his candidacy. REUTERS/Ina Fassbender (GERMANY - Tags: TRANSPORT BUSINESS)