Tornado kills multiple people in Iowa as storms tear through Midwest

GREENFIELD, Iowa — Multiple people were killed when a tornado tore through a small town in Iowa and left a wide swath of obliterated homes and crumpled cars, while the howling winds also twisted and toppled wind turbines.  After devastating Greenfield, a town of 2,000, on Tuesday the storms moved eastward to pummel parts of Illinois and Wisconsin, knocking out power to tens of thousands of customers in the two states.  Greenfield's hospital was among the buildings that were damaged in the town...