Song of the Day: 'By Degrees' by Mark Erelli and Rosanne Cash

Great to see smart people gather to do something about these endless mass shootings -- and being recognized for their efforts.

 Learn more about Giffords: Courage to Fight Gun Violence HERE.

Here's Rosanne with the writer ...

And the full crew, including Sheryl Crow, Lori McKenna, Anais Mitchell and Josh Ritter