Dewey Montgomery is now an accomplished flint knapper, the technical term for shaping and reshaping rocks into arrowheads. For the last four years Dewey estimates he's made thousands of arrowheads, both large and small. He says he starts with a large rock and just beats it into shape, taking off layer after layer to get it as thin as possible without breaking. Dewey says it's kind of like peeling an onion, being careful not to tear too much away. In the end he's left with a piece of historic art that will be around long after he's gone.