THE GREATER TAHOE-TRUCKEE AREA, Calif./Nev – While touring French castles, it dawned on Heather Dawson, “Defensible space has been around for thousands of years,” the Truckee Firewise leader and KNOW-WILDFIRE founder concluded, “But what we’re defending against has changed.” For the French castles, it was against archers and knights, but for our modern-day castles, it’s wildfire. At times, the intruder can be as small as a one-eighth-inch ember,…