(Reuters) - The 24 Hours of Le Mans celebrates its 100th birthday this weekend with organisers of the world's most famous sportscar race looking towards a greener future while paying homage to the past.
A sold-out crowd of more than 300,000 is expected, many of them travelling to France by car in what has become an annual pilgrimage for British racing fans since the success of the 1920s 'Bentley Boys'.
