Guardian: Fire Helicopter One skimmed over the roofs of Fullerton, rotors whumping, and banked east, crossing the 91 freeway into a national park which from a distance appeared lush and green. Scudding between two canyons, however, you could see it was brown scrub a desolate vista of parched grass and stunted vegetation covering steep slopes. "In a normal year these hills would be covered with brilliant yellow and purple wildflowers," said David Lopez, pointing out of the cockpit window. "But because of...