 French officials insist the Seine River will be clean enough to swim in during the Olympics. France's sports minister on Saturday morning going for a swim in the Seine as the French government and Olympic organizers continue their public relations push to convince the world that the famous river is ready to welcome swimming events for the Paris Olympics, including triathlon and open water swimming. Heavy rains in Paris can cause the sewage system to overflow. ABC's Ines de la Cutera. At the multiplexes. On movie screens this weekend.