Blizzards and icy winds paralysed the northeastern United States on Wednesday, shutting down federal government for a third day and spreading Washington's misery north to New York and Boston. The latest falls made 2009-2010 the snowiest winter on record for the capital and brought conditions so perilous that people were banned from driving in the nearby city of Baltimore. New York Mayor Michael Bloomberg ordered schools closed for a rare "snow day" and the United Nations headquarters were also shuttered, but the worst of the weather was initially further south in snow-weary Washington. Residents had barely dug themselves out from...