Ottawa, ON, Aug 24, 2010 — Some trades change all the time: new tools, new techniques, new materials. Others hardly change at all. That's something Robert Vaughn likes about being a blacksmith. He's pretty sure he could trade places with a smith from Roman times, and neither one would get lost working at the other's forge. Lucy Martin spoke with Vaughn as he hand-pumped double bellows to heat coals at a heritage event in Ottawa.