Ben Harper and Charlie Musselwhite know something about the darkness that underlies the deepest of blues. Standing side by side on a small stage in Los Angeles in March, the duo ease into the haunted twang of a song called "No Mercy in This Land," with Harper on electric bottleneck
This article originally appeared on www.rollingstone.com: Ben Harper and Charlie Musselwhite on Their Deeply Rooted ’21st-Century Blues’