For the general public, the Landing it is before any the unforgettable images of the " longest Day " or of " It is necessary to save the soldier Ryan ". We often ignore that, behind this spectacular military operation, there is the most tremendous of all times organization which Michel Chevalet makes live again for you: the construction of two artificial harbours. A meccano of 500 parts, weighing 1/2 one million tons, brought in separate parts since England and installed in eight days to land 200 000 vehicles and 2 million men. Without Omaha and especially Arromanches, the allies would not maybe have made a success of the Landing.