Joined by friends and family for this very special celebratory concert -- a must-see event for country music fans -- the Nitty Gritty Dirt Band performs selections from their highly acclaimed "Will the Circle Be Unbroken" album series. One of the genre's most widely admired groups, the Dirt Band is accompanied here by country greats such as Vince Gill, Rosanne Cash, Alison Krauss, Earl Scruggs and many others.