Mavis Staples was a teenager when Pops Staples started taking the family to Dr. King's marches. They'd sing before he spoke. She'd look out at the crowd and see people who'd walked miles, who'd been beaten, who kept showing up. The music had to match. I'll Take You There. Respect Yourself. The Staple Singers were the soundtrack of the movement.

She went solo in the 1970s, and in the 2000s found a new collaborator in Jeff Tweedy of Wilco. You Are Not Alone. We'll Never Turn Back -- an album of freedom songs reconfigured for the 21st century. The voice is deeper now, more weathered, more knowing, but the righteous fire never dimmed. She's in her eighties and still touring.

Mavis Staples marched with Dr. King as a teenager. She's been marching ever since. The Staple Singers turned gospel into protest music. Her solo work turned protest into prayer. The voice hasn't stopped.

Mavis Staples marched with Dr. King as a teenager. Still marching. The voice hasn't stopped. I'll Take You There.