Alison Krauss

Gov't Mule, the Avett Brothers and many other acts will appear on various dates.

The duo's March performance at Red Rocks will be available as a worldwide stream.

Five additional shows have been added to current trek.

Three Led Zeppelin covers were among the highlights of the show.

Duo adds 13 stops to itinerary, keeping them on the road through September.

Led Zeppelin legend felt "exposed and vulnerable" as duet album ‘Raising Sand’ began to form.

"I still don’t know enough to stop in any respect," singer said of his continuing career.

Their second collaboration, 'Raise the Roof,' arrives today.

He wondered if they could repeat the artistic success of ‘Raising Sand’ some 14 years later.

Listen to the only original song on their second album, ‘Raise the Roof.’

Upcoming album will include a wide range of folk, blues and rock covers, plus one original.

Track was made famous by Lucinda Williams in 1998.