Blowing snow reduces vision as motorists wait for a light change in Lawrence, Kan., Thursday, Dec. 20, 2012. The Midwest's first major snowstorm of the season was sweeping across severa

 

              Blowing snow reduces vision as motorists wait for a light change in Lawrence, Kan., Thursday, Dec. 20, 2012. The Midwest
Blowing snow reduces vision as motorists wait for a light change in Lawrence, Kan., Thursday, Dec. 20, 2012. The Midwest's first major snowstorm of the season was sweeping across several states early Thursday, shuttering schools, creating treacherous roadways and threatening to slow down one of the nation's busiest airports ahead of the holiday weekend. (AP Photo/Orlin Wagner)