Warren Haynes from Gov’t Mule and The Allman Brothers Band talks about his connection with Dave Grohl, Johnny Cash, how Billy Bob Thorton got on the new album and playing with Paul Rogers (Bad Company), Slash (Guns N’ Roses) and Billy F. Gibbons (ZZ Top) at the CMT tribute to Gary Rossington (Lynyrd Skynyrd). “Peace…Like A River” is out now. – Forrest