Listening to the 18-minute musical monologue has been a Thanksgiving tradition among folk music fans for decades.
The worst drought in decades is raising concerns that parts of the Mississippi River could be closed to shipping at some point.
This despite emergency dredging and rock removal by the US Army Corps of Engineers.
If the river is closed, shippers would be forced to use more expensive railroads to get their good where they need to go.
Experts share a range of perspectives on how to combat the Islamic State militant group, and the role the U.S. should play.