>> absolutely, selma. thank you so much for your reporting as always. coming up next for us cnn's bill weir is live in the mississippi river basin and, bill, another amazing discovery revealed. >> reporter: so many. so many, kate. this is just one part of steamboat graveyard exposed by the drought but being exposed huge vulnerabilities in america's supply chain. so much of our bread and butter floats down this river and now these barges are stuck and just praying for rain. we'll tell you about it next. and i'm going to tell you about exciting medicare advantage plans that can provide oad cov...