Changes over time in nature, such as the lowering of a river, can reveal treasures from times long past. We talk to a photographer who hunts for unnatural objects, likely from people who lived here long before us, down by the riverside. We also talk about this week's top national news, including a look at the bid for House speakership. And we explore what it would take for a big reform and overhaul bill for prison sentencing to be put into action.