Smoke from the Thomas Fire in Ventura County, Calif., billows into the sky, Dec. 10, 2017. The fire, which started Dec. 4, continues to grow in acreage and is becoming one of the largest wildfires in the state's history. The California National Guard is providing a variety of air assets to fight the fires, including helicopters, air tankers, and remotely piloted aircraft. California Air National Guard photo by Senior Airman Crystal Housman