John Fogerty is sipping tea from a plaid mug inside his home recording studio when he suddenly gets a little emotional. It’s a sunny Wednesday afternoon in Thousand Oaks, Calif., and the studio space, with its candlelit stone walls and rustic wooden beams, feels more like a ranch that belongs in Big Sky Country than an estate 35 miles outside of Los Angeles. At 71, his face is more deeply lined than it once was but little else has changed. He’s wearing a beat-up pair of Levi’s and a handkerchief tied around his neck, and if you didn’t know him to be a living rock legend, you might peg him as the flannel-wearing down-to-earth host of a wildlife show on PBS. But surrounding Fogerty today are the guitars that helped him create the Mississippi Delta-inflected music of Creedence Clearwater Revival -- a sound that would land him five top 10 albums on the Billboard 200 and weave him into the DNA of a politically charged Vietnam-era America.