Flashback: Bob Dylan and Willie Nelson Sing 'Pancho And Lefty'

Says it all in the title.  This is a great tune that Willie Nelson originally did with Merle Haggard.  Here, he, and Bob Dylan, have a go at it.

http://www.rollingstone.com/music/videos/flashback-bob-dylan-and-willie-nelson-sing-pancho-and-lefty-20130515