Nightly News | September 05, 2013
>>> in this country this evening, investigators believe they know the apparent cause of that huge fire that burned in and around yosemite national park . it consumed 370 square miles , 111 structures. u.s. forest service said today it started when a hunter built an illegal fire and allowed it to get out of control. there had been some speculation out west that illegal marijuana farming may have been involved in this, but the forest service said there's no indication to confirm that.