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Francois Michelin (C), former chairman of French tyre-making giant Michelin between 1955 and 1999, speaks with Michelin current CEO Jean-Dominique Senard (L) and French Economy and Industry Minister Arnaud Montebourg (R) during a visit of the French President on the Michelin Ladoux plant in Cebazat near Clemont-Ferrand, centre France, on April 18, 2014. AFP PHOTO POOL / THIERRY ZOCCOLAN (Photo credit should read THIERRY ZOCCOLAN/AFP/Getty Images)

Francois Michelin (C), former chairman of French tyre-making giant Michelin between 1955 and 1999, speaks with Michelin current CEO Jean-Dominique Senard (L) and French Economy and Industry Minister Arnaud Montebourg (R) during a visit of the French President on the Michelin Ladoux plant in Cebazat near Clemont-Ferrand, centre France, on April 18, 2014. AFP PHOTO POOL / THIERRY ZOCCOLAN        (Photo credit should read THIERRY ZOCCOLAN/AFP/Getty Images)