A freight train loaded with ethanol crashed and exploded Friday, sending up bright orange flames and plumes of smoke that could be seen miles away and forcing the evacuation of a small town in northern Illinois. Capt. Steve Haywood of the Ottawa Fire Department said the train’s tanker cars were shipping ethanol for Decatur-based corn processor Archer Daniels Midland, and possibly other materials and chemicals, when it crashed and derailed. At least six tanker cars were burning, he said.