Active flame front of the Zaca Fire (IMAGE) PLOS Caption Active flame front of the Zaca Fire, the second largest fire on record in California. U.S. Forest Service. Credit John Newman, Wikimedia, CC0 (https://creativecommons.org/publicdomain/zero/1.0/) Usage Restrictions No restrictions. License CC0 Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.