Let's end this week with a little inspiration: the unlikely story of Robert Finley.In just over three years, the 64-year-old blues guitarist and singer went from working as a carpenter to performing across the country,including a recent show at Washington, D.C.'s Anthem theater, where we caught up with him.William Brangham and producer Frank Carlson bring us his remarkable story. Let's have a listen.I'm a 64-year-old great-grandfather, and I'm just getting ready to rock.My name is Robert Finley. I'm from Bernice, Louisiana.I was born and raised in a little town called Winnsboro. I'm a sharecropper's son.I guess you could say we're one of those sharecroppers that really never got their share.Started playing music. I had an interest in it all my life since I was old enough to remember.I played in the military. I happened to be the leader of the Army band when I was in Germany.