with Taj Mahal, Jackson Browne

with Dave Alvin, Ramblin' Jack Elliott

with Nickel Creek

with The Police, Ziggy Marley

with Tom Morello: The Nightwatchman

with Tom Morello: The Nightwatchman

with Tom Morello: The Nightwatchman

with Tom Morello: The Nightwatchman

with Neil Young, Pearl Jam, R.E.M., Dave Matthews, Tracy Chapman, Billy Idol, Jill Sobule

with Jack Johnson

with Jack Johnson

with Jack Johnson

with Galactic

with Blackalicious

with Alvin Youngblood Hart