Nonna. I know a lot about everything in your film. We are studying this in school. I know about Combined Sewer Overflows and species in rivers. I know that pollution is happening in every river and it’s a problem for everyone who drinks from rivers. The only thing different is that your movie is about the Potomac River and I know about the Hudson River. Lila S. , 6th grade MS 447, Brooklyn, NY. Granddaughter of Peggy Fleming.