<p>The modern version of an African-American spiritual has helped draw together people who are fighting for justice.</p>
<p>It's one of the oldest folk ballads in our national songbook, but where did it come from? The answer is complex, multi-layered, American.</p>
<p>The blind guitarist and singer from Deep Gap, North Carolina transformed American music by blending bluegrass, folk, country, blues, and gospel.</p>
