Olympic Games are often the gateway to expensive madness. From Athens to Tokyo, via London and Rio, the latest editions have all blown the planned budgets.

Would the Paris 2024 Games be synonymous with proud madness? Many people think and say it. Not because of the gigantic equipment to be built, but because the sheer scale of the opening ceremony. How can we ensure the security of the parade of delegations of athletes, which will not take place in a stadium, but on the Seine, between the Pont d'Austerlitz and the Trocadéro?