A West Bend, Wisconsin, snowplow driver is being hailed as a hero after he saved a 5-year-old boy who wandered away from his home in subzero temperatures.It happened about 4 a.m. last Friday.”It was snowing, blowing and miserable,” David Gehrke said about that morning he climbed into his truck.As he cleared streets near South River Road and Kilbourn Avenue, he saw something by his wing