A U.S. Marine Corps CH-46 Sea Knight helicopter helps fight fires and contain the Cocos fire in San Marcos, Calif., May 16, 2014. A U.S. Marine Corps CH-46 Sea Knight helicopter helps fight fires and contain the Cocos fire in San Marcos, Calif., May 16, 2014. SHARE: Download: Full Size (0.59 MB) Tags: photo essays Credit: VIRIN: 014188-H-NHH87-207.jpg Photo Gallery