Firefighter killed in gas explosion, fire near Madison, Wisconsin

SUN PRAIRIE, Wis. (AP) — A firefighter was killed and at least a dozen other people were injured when a natural gas explosion leveled at least two buildings in a Wisconsin community, authorities said Wednesday.Firefighters had arrived to investigate a gas leak in the Madison suburb of Sun Prairie when the explosion happened Tuesday evening. The blast destroyed several buildings and ignited a fire that belched a plume of ink-black smoke that could be seen for miles.Mahlon Mitchell, presiden