French Sports Minister Amélie Oudéa-Castéra swam in the River Seine, aiming to demonstrate its cleanliness for hosting Olympic events. Paris Mayor Anne Hidalgo and French President Emmanuel Macron have also pledged to swim in the Seine. The river, historically polluted, is set to host triathlon and marathon swimming events during the upcoming Paris Olympics. The recent swim by Oudéa-Castéra, accompanied by Paralympic flag bearer Alexis Hanquinquant, symbolizes the efforts to make the Seine suitable for swimming competitions. Despite past pollution challenges, French authorities have invested significantly to ensure the river meets required standards.