July 17, 2024: Democratic voters on Biden’s future; A flight to figure out smog; A divine piano

As Republicans move forward with Donald Trump as their nominee, Democrats remain in disarray over their presidential pick. CPR’s public affairs team has been listening to Coloradans. We'll share what they've heard. Then, the political divide inspired a Denver man to visit every U.S. county. Plus, researchers go airborne to get a better grasp on summer smog. And how one particular piano inspired Lumineer Jeremiah Fraites.