A catamaran boat navigates on the Seine river with the Eiffel Tower in background, after the first triathlon training session was cancelled during the Paris 2024 Olympic Games in Paris, on July 28, 2024, due to the pollution of the Seine river. The improved weather failed to prevent the first triathlon training session in the River Seine from being cancelled on July 28, 2024. Following a meeting "on the water quality" and tests, "a joint decision was taken to cancel the swimming part of the triathlon orientation," a Paris 2024 and World Triathlon statement said. (Photo by Valentine CHAPUIS / AFP)