CBS Evening News | A new winter storm threatening large parts of the U.S. could hamper holiday travel as millions are expected to hit the roads, rails and airways. Eric Fisher, chief meteorologist of CBS Boston station WBZ, has the latest on the upcoming storm's impact

A new winter storm threatening large parts of the U.S. could hamper holiday travel as millions are expected to hit the roads, rails and airways. Eric Fisher, chief meteorologist of CBS Boston station WBZ, has the latest on the upcoming storm's impact. Air Date: Dec 20, 2013