State-by-state look at frigid blast hitting US - Article Photos 20/36

Craig Sheldon is all bundled up as he plants fence posts into the ground in sub-freezing conditions, in Gretna, Neb., Friday, Dec. 6, 2013. The temperature registered 10 degrees and the wind chill was -7 Fahrenheit as a cold snap enveloped the mid-section of the nation. (AP Photo/Nati Harnik)