Soldiers battle wildfires at Yosemite National Park. Army Chief Warrant Officer Chris Aylstock, Capt. Colton Brauer, Sgt. Chris Boni and Scott Corn, California's fire manager, battle the Rim fire over Yosemite National Park, California, August 22, 2013. Aylstock, Brauer and Boni are assigned to the 1st Battaltion, 140th Aviation Regiment, California National Guard.