California´s largest wildfire of the year had grown to 60,000 acres by this morning in the Sequoia National Forest. The 1,500 firefighters on the ground and in air tankers are in the sixth day of battling the blaze that has threatened groves of some of the world´s largest and oldest trees. Fire officials say that backfires and firebreaks along the western flank of the blaze have succeeded in sparing many of the big sequoias. But the fire about 130 miles north of Los Angeles still has the potential to reach eleven of 38 groves in Giant Sequoia National Monument. Since the blaze began, apparently with an illegal campfire on Sunday, it has cost an estimated $5.2 million in firefighting costs.