Coordinated arson attacks on France's high-speed rail network have disrupted travel for hundreds of thousands of people just hours before the opening ceremony of the 2024 Paris Olympics. The attacks targeted fiber optic cables and critical signaling infrastructure at multiple remote locations, resulting in significant delays and cancellations. French authorities have described the sabotage as premeditated and calculated, with no direct threats to the Olympic events themselves. Security measures have been intensified, including the deployment of 45,000 police officers and 10,000 military personnel. SNCF, the national railway company, is working to restore services, but disruptions are expected to last through the weekend. Investigations are ongoing, and no group has claimed responsibility for the attacks.